M
Michael Terrell
Guest
He is just an arc flash away from making an ash of himself.
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M
Michael Terrell
Guest
He is just an arc flash away from making an ash of himself.
C
Commander Kinsey
Guest
On Thu, 16 Jul 2020 21:03:04 +0100, Ralph Mowery <rmowery28146@earthlink.net> wrote:
Yes.
> I did before retiring. One learns to respect what can hapen.
I\'ve seen what happens when you connect two phases to one phase equipment, it\'s quite amusing.
And I don\'t respect things that will probably never happen.
In article <op.0nu3kdf9wdg98l@glass>, CFKinsey@military.org.jp says...
Safety movies designed to sell Fluke meters, and you fell for them hook line and sinker.
No, I have actually seen a few blowups and the results of some others.
Have you ever worked at a place that has lots of 480 volt 3 phase
equipment ?
Yes.
> I did before retiring. One learns to respect what can hapen.
I\'ve seen what happens when you connect two phases to one phase equipment, it\'s quite amusing.
And I don\'t respect things that will probably never happen.
C
Commander Kinsey
Guest
On Thu, 16 Jul 2020 21:03:04 +0100, Ralph Mowery <rmowery28146@earthlink.net> wrote:
Yes.
> I did before retiring. One learns to respect what can hapen.
I\'ve seen what happens when you connect two phases to one phase equipment, it\'s quite amusing.
And I don\'t respect things that will probably never happen.
In article <op.0nu3kdf9wdg98l@glass>, CFKinsey@military.org.jp says...
Safety movies designed to sell Fluke meters, and you fell for them hook line and sinker.
No, I have actually seen a few blowups and the results of some others.
Have you ever worked at a place that has lots of 480 volt 3 phase
equipment ?
Yes.
> I did before retiring. One learns to respect what can hapen.
I\'ve seen what happens when you connect two phases to one phase equipment, it\'s quite amusing.
And I don\'t respect things that will probably never happen.
C
Commander Kinsey
Guest
On Thu, 16 Jul 2020 21:03:04 +0100, Ralph Mowery <rmowery28146@earthlink.net> wrote:
Yes.
> I did before retiring. One learns to respect what can hapen.
I\'ve seen what happens when you connect two phases to one phase equipment, it\'s quite amusing.
And I don\'t respect things that will probably never happen.
In article <op.0nu3kdf9wdg98l@glass>, CFKinsey@military.org.jp says...
Safety movies designed to sell Fluke meters, and you fell for them hook line and sinker.
No, I have actually seen a few blowups and the results of some others.
Have you ever worked at a place that has lots of 480 volt 3 phase
equipment ?
Yes.
> I did before retiring. One learns to respect what can hapen.
I\'ve seen what happens when you connect two phases to one phase equipment, it\'s quite amusing.
And I don\'t respect things that will probably never happen.
C
Commander Kinsey
Guest
On Thu, 16 Jul 2020 21:13:11 +0100, Michael Terrell <terrell.michael.a@gmail.com> wrote:
> He is just an arc flash away from making an ash of himself.
I\'ve done that actually, just scorched my hand for a couple of weeks.
> He is just an arc flash away from making an ash of himself.
I\'ve done that actually, just scorched my hand for a couple of weeks.
C
Commander Kinsey
Guest
On Thu, 16 Jul 2020 21:13:11 +0100, Michael Terrell <terrell.michael.a@gmail.com> wrote:
> He is just an arc flash away from making an ash of himself.
I\'ve done that actually, just scorched my hand for a couple of weeks.
> He is just an arc flash away from making an ash of himself.
I\'ve done that actually, just scorched my hand for a couple of weeks.
C
Commander Kinsey
Guest
On Thu, 16 Jul 2020 21:13:11 +0100, Michael Terrell <terrell.michael.a@gmail.com> wrote:
> He is just an arc flash away from making an ash of himself.
I\'ve done that actually, just scorched my hand for a couple of weeks.
> He is just an arc flash away from making an ash of himself.
I\'ve done that actually, just scorched my hand for a couple of weeks.
C
Commander Kinsey
Guest
On Thu, 16 Jul 2020 18:54:08 +0100, Michael Terrell <terrell.michael.a@gmail.com> wrote:
> 208 is a standard three phase voltage. It is three 120 volt lines phased 120 degrees apart.
Ah, I didn\'t know that existed. I thought you only got 120 when you centre tapped a single 240. If you\'re gonna use three phase, wouldn\'t you want more voltage?
> 208 is a standard three phase voltage. It is three 120 volt lines phased 120 degrees apart.
Ah, I didn\'t know that existed. I thought you only got 120 when you centre tapped a single 240. If you\'re gonna use three phase, wouldn\'t you want more voltage?
C
Commander Kinsey
Guest
On Thu, 16 Jul 2020 18:54:08 +0100, Michael Terrell <terrell.michael.a@gmail.com> wrote:
> 208 is a standard three phase voltage. It is three 120 volt lines phased 120 degrees apart.
Ah, I didn\'t know that existed. I thought you only got 120 when you centre tapped a single 240. If you\'re gonna use three phase, wouldn\'t you want more voltage?
> 208 is a standard three phase voltage. It is three 120 volt lines phased 120 degrees apart.
Ah, I didn\'t know that existed. I thought you only got 120 when you centre tapped a single 240. If you\'re gonna use three phase, wouldn\'t you want more voltage?
C
Commander Kinsey
Guest
On Thu, 16 Jul 2020 18:54:08 +0100, Michael Terrell <terrell.michael.a@gmail.com> wrote:
> 208 is a standard three phase voltage. It is three 120 volt lines phased 120 degrees apart.
Ah, I didn\'t know that existed. I thought you only got 120 when you centre tapped a single 240. If you\'re gonna use three phase, wouldn\'t you want more voltage?
> 208 is a standard three phase voltage. It is three 120 volt lines phased 120 degrees apart.
Ah, I didn\'t know that existed. I thought you only got 120 when you centre tapped a single 240. If you\'re gonna use three phase, wouldn\'t you want more voltage?
C
Commander Kinsey
Guest
On Thu, 16 Jul 2020 08:30:20 +0100, Cydrome Leader <presence@mungepanix.com> wrote:
Isn\'t that really hard to work out? We use cross sectional area in mm. Which is really easy to imagine. With the added bonus that a higher number is thicker. It\'s also pretty handy as a rough guide that 1 square mm carries 10 amps.
> and sheet metal.
Seriously? Wow. Why would you nbot measure a thickness in a unit of distance?
We use microns.
Depends if something else is in the way. I\'d always try to use round numbers.
In sci.electronics.equipment Commander Kinsey <CFKinsey@military.org.jp> wrote:
On Sun, 12 Jul 2020 20:21:10 +0100, Tom Gardner <spamjunk@blueyonder.co.uk> wrote:
On 12/07/20 19:01, Pimpom wrote:
On 7/12/2020 11:15 PM, Commander Kinsey wrote:
On Fri, 26 Jun 2020 05:23:31 +0100, Cydrome Leader <presence@mungepanix.com
wrote:
In sci.electronics.equipment Pimpom <nobody@nowhere.com> wrote:
My mechanical slide caliper has a resolution of 0.001 inch. This
means that it can display measurements with a precision of 1 mil,
What if your caliper had a resolution of 1 mil +/- 3 counts on the last
digit?
.....<snip>........
In America, what is a \"mill\"? In the UK, it used to mean a thousandth of an
inch, but people use it to mean a millimetre nowadays.
It\'s not a mill. It\'s mil - single l. It means, and has always meant, a
thousandth of an inch. It\'s not an Americanism.
In the UK \"mill\" means millilitre.
If you want to refer to fractions of an inch, then
it is /always/ \"thou\", i.e. thousandths of an inch.
In the UK \"mil/mill\" /never/ means 0.001\".
Yes it does. My neighbour\'s a tradesman (in Scotland) and says
\"mill/mil\" (I don\'t know which as they sound the same in speech) as
shorthand for millimetre. As in \"that kitchen unit is 600 mill wide\".
Since we don\'t use inches for such things in the UK, there\'s no
confusion.
The context there is key too. While I\'d not measure a countertop or
whatever in millimeters, it would make no sense that anything in a kitchen
would be measured thicknesses of paper.
We (in the US) use \"guage\" for wire
Isn\'t that really hard to work out? We use cross sectional area in mm. Which is really easy to imagine. With the added bonus that a higher number is thicker. It\'s also pretty handy as a rough guide that 1 square mm carries 10 amps.
> and sheet metal.
Seriously? Wow. Why would you nbot measure a thickness in a unit of distance?
We also use \"guage\"
for measuring really thin stuff like plastic films. In the last case, it\'s
a completly different unit, but with proper context won\'t confuse anybody.
We use microns.
Question for the metric woodworkers. Does anybody cut a piece of wood to
317mm or 429mm or other off numbers when building a house or handing a
door or installing a countertop?
Depends if something else is in the way. I\'d always try to use round numbers.
C
Commander Kinsey
Guest
On Thu, 16 Jul 2020 08:30:20 +0100, Cydrome Leader <presence@mungepanix.com> wrote:
Isn\'t that really hard to work out? We use cross sectional area in mm. Which is really easy to imagine. With the added bonus that a higher number is thicker. It\'s also pretty handy as a rough guide that 1 square mm carries 10 amps.
> and sheet metal.
Seriously? Wow. Why would you nbot measure a thickness in a unit of distance?
We use microns.
Depends if something else is in the way. I\'d always try to use round numbers.
In sci.electronics.equipment Commander Kinsey <CFKinsey@military.org.jp> wrote:
On Sun, 12 Jul 2020 20:21:10 +0100, Tom Gardner <spamjunk@blueyonder.co.uk> wrote:
On 12/07/20 19:01, Pimpom wrote:
On 7/12/2020 11:15 PM, Commander Kinsey wrote:
On Fri, 26 Jun 2020 05:23:31 +0100, Cydrome Leader <presence@mungepanix.com
wrote:
In sci.electronics.equipment Pimpom <nobody@nowhere.com> wrote:
My mechanical slide caliper has a resolution of 0.001 inch. This
means that it can display measurements with a precision of 1 mil,
What if your caliper had a resolution of 1 mil +/- 3 counts on the last
digit?
.....<snip>........
In America, what is a \"mill\"? In the UK, it used to mean a thousandth of an
inch, but people use it to mean a millimetre nowadays.
It\'s not a mill. It\'s mil - single l. It means, and has always meant, a
thousandth of an inch. It\'s not an Americanism.
In the UK \"mill\" means millilitre.
If you want to refer to fractions of an inch, then
it is /always/ \"thou\", i.e. thousandths of an inch.
In the UK \"mil/mill\" /never/ means 0.001\".
Yes it does. My neighbour\'s a tradesman (in Scotland) and says
\"mill/mil\" (I don\'t know which as they sound the same in speech) as
shorthand for millimetre. As in \"that kitchen unit is 600 mill wide\".
Since we don\'t use inches for such things in the UK, there\'s no
confusion.
The context there is key too. While I\'d not measure a countertop or
whatever in millimeters, it would make no sense that anything in a kitchen
would be measured thicknesses of paper.
We (in the US) use \"guage\" for wire
Isn\'t that really hard to work out? We use cross sectional area in mm. Which is really easy to imagine. With the added bonus that a higher number is thicker. It\'s also pretty handy as a rough guide that 1 square mm carries 10 amps.
> and sheet metal.
Seriously? Wow. Why would you nbot measure a thickness in a unit of distance?
We also use \"guage\"
for measuring really thin stuff like plastic films. In the last case, it\'s
a completly different unit, but with proper context won\'t confuse anybody.
We use microns.
Question for the metric woodworkers. Does anybody cut a piece of wood to
317mm or 429mm or other off numbers when building a house or handing a
door or installing a countertop?
Depends if something else is in the way. I\'d always try to use round numbers.
C
Commander Kinsey
Guest
On Thu, 16 Jul 2020 08:30:20 +0100, Cydrome Leader <presence@mungepanix.com> wrote:
Isn\'t that really hard to work out? We use cross sectional area in mm. Which is really easy to imagine. With the added bonus that a higher number is thicker. It\'s also pretty handy as a rough guide that 1 square mm carries 10 amps.
> and sheet metal.
Seriously? Wow. Why would you nbot measure a thickness in a unit of distance?
We use microns.
Depends if something else is in the way. I\'d always try to use round numbers.
In sci.electronics.equipment Commander Kinsey <CFKinsey@military.org.jp> wrote:
On Sun, 12 Jul 2020 20:21:10 +0100, Tom Gardner <spamjunk@blueyonder.co.uk> wrote:
On 12/07/20 19:01, Pimpom wrote:
On 7/12/2020 11:15 PM, Commander Kinsey wrote:
On Fri, 26 Jun 2020 05:23:31 +0100, Cydrome Leader <presence@mungepanix.com
wrote:
In sci.electronics.equipment Pimpom <nobody@nowhere.com> wrote:
My mechanical slide caliper has a resolution of 0.001 inch. This
means that it can display measurements with a precision of 1 mil,
What if your caliper had a resolution of 1 mil +/- 3 counts on the last
digit?
.....<snip>........
In America, what is a \"mill\"? In the UK, it used to mean a thousandth of an
inch, but people use it to mean a millimetre nowadays.
It\'s not a mill. It\'s mil - single l. It means, and has always meant, a
thousandth of an inch. It\'s not an Americanism.
In the UK \"mill\" means millilitre.
If you want to refer to fractions of an inch, then
it is /always/ \"thou\", i.e. thousandths of an inch.
In the UK \"mil/mill\" /never/ means 0.001\".
Yes it does. My neighbour\'s a tradesman (in Scotland) and says
\"mill/mil\" (I don\'t know which as they sound the same in speech) as
shorthand for millimetre. As in \"that kitchen unit is 600 mill wide\".
Since we don\'t use inches for such things in the UK, there\'s no
confusion.
The context there is key too. While I\'d not measure a countertop or
whatever in millimeters, it would make no sense that anything in a kitchen
would be measured thicknesses of paper.
We (in the US) use \"guage\" for wire
Isn\'t that really hard to work out? We use cross sectional area in mm. Which is really easy to imagine. With the added bonus that a higher number is thicker. It\'s also pretty handy as a rough guide that 1 square mm carries 10 amps.
> and sheet metal.
Seriously? Wow. Why would you nbot measure a thickness in a unit of distance?
We also use \"guage\"
for measuring really thin stuff like plastic films. In the last case, it\'s
a completly different unit, but with proper context won\'t confuse anybody.
We use microns.
Question for the metric woodworkers. Does anybody cut a piece of wood to
317mm or 429mm or other off numbers when building a house or handing a
door or installing a countertop?
Depends if something else is in the way. I\'d always try to use round numbers.
R
Ralph Mowery
Guest
In article <op.0nvd9pimwdg98l@glass>, CFKinsey@military.org.jp says...
If you had respected things that probably would never hapen, you would
not have scorched your hand.
He is just an arc flash away from making an ash of himself.
I\'ve done that actually, just scorched my hand for a couple of weeks.
If you had respected things that probably would never hapen, you would
not have scorched your hand.
R
Ralph Mowery
Guest
In article <op.0nvd9pimwdg98l@glass>, CFKinsey@military.org.jp says...
If you had respected things that probably would never hapen, you would
not have scorched your hand.
He is just an arc flash away from making an ash of himself.
I\'ve done that actually, just scorched my hand for a couple of weeks.
If you had respected things that probably would never hapen, you would
not have scorched your hand.
R
Ralph Mowery
Guest
In article <op.0nvd9pimwdg98l@glass>, CFKinsey@military.org.jp says...
If you had respected things that probably would never hapen, you would
not have scorched your hand.
He is just an arc flash away from making an ash of himself.
I\'ve done that actually, just scorched my hand for a couple of weeks.
If you had respected things that probably would never hapen, you would
not have scorched your hand.
J
Jasen Betts
Guest
On 2020-07-16, Cydrome Leader <presence@MUNGEpanix.com> wrote:
sheet metal in mm (1.6mm, 0.65mm etc...)
plastic sheet in microns 40um etc.
electric wire in square mm.
fencing wire in mm diameter.
Yes, if that is the right size. buildings are usually specified in
multiples of 100mm. often multiples of 300mm or 1000mm
furniture usually in multiples of 25mm
Factory door sizes are 620mm + multiples of 50mm, but not all openings
are the right size for the factory door.
Timber sizes for dressed finger-jointed framing timber are accurate to
withion 0.5mm are are certain preferred multiples of 5mm eg: 70x35 used
mainly for non-structual walls. 90x45 used mainly for structural walls.
The stud spacing and top-plate height will typically be some multiple
of 50mm So a lot of the cutting for studs, and blocking is at multiples
of 5mm. that\'s if you\'re not using pre-fabricated framing.
Carpenters use millimeteres. they say centimeters
are for tailors, and inches are for cobblers.
--
Jasen.
In sci.electronics.equipment Commander Kinsey <CFKinsey@military.org.jp> wrote:
On Sun, 12 Jul 2020 20:21:10 +0100, Tom Gardner <spamjunk@blueyonder.co.uk> wrote:
On 12/07/20 19:01, Pimpom wrote:
On 7/12/2020 11:15 PM, Commander Kinsey wrote:
On Fri, 26 Jun 2020 05:23:31 +0100, Cydrome Leader <presence@mungepanix.com
wrote:
In sci.electronics.equipment Pimpom <nobody@nowhere.com> wrote:
My mechanical slide caliper has a resolution of 0.001 inch. This
means that it can display measurements with a precision of 1 mil,
What if your caliper had a resolution of 1 mil +/- 3 counts on the last
digit?
.....<snip>........
In America, what is a \"mill\"? In the UK, it used to mean a thousandth of an
inch, but people use it to mean a millimetre nowadays.
It\'s not a mill. It\'s mil - single l. It means, and has always meant, a
thousandth of an inch. It\'s not an Americanism.
In the UK \"mill\" means millilitre.
If you want to refer to fractions of an inch, then
it is /always/ \"thou\", i.e. thousandths of an inch.
In the UK \"mil/mill\" /never/ means 0.001\".
Yes it does. My neighbour\'s a tradesman (in Scotland) and says
\"mill/mil\" (I don\'t know which as they sound the same in speech) as
shorthand for millimetre. As in \"that kitchen unit is 600 mill wide\".
Since we don\'t use inches for such things in the UK, there\'s no
confusion.
The context there is key too. While I\'d not measure a countertop or
whatever in millimeters, it would make no sense that anything in a kitchen
would be measured thicknesses of paper.
We (in the US) use \"guage\" for wire and sheet metal. We also use \"guage\"
for measuring really thin stuff like plastic films. In the last case, it\'s
a completly different unit, but with proper context won\'t confuse anybody.
sheet metal in mm (1.6mm, 0.65mm etc...)
plastic sheet in microns 40um etc.
electric wire in square mm.
fencing wire in mm diameter.
Question for the metric woodworkers. Does anybody cut a piece of wood to
317mm or 429mm or other off numbers when building a house or handing a
door or installing a countertop?
Yes, if that is the right size. buildings are usually specified in
multiples of 100mm. often multiples of 300mm or 1000mm
furniture usually in multiples of 25mm
Factory door sizes are 620mm + multiples of 50mm, but not all openings
are the right size for the factory door.
Timber sizes for dressed finger-jointed framing timber are accurate to
withion 0.5mm are are certain preferred multiples of 5mm eg: 70x35 used
mainly for non-structual walls. 90x45 used mainly for structural walls.
The stud spacing and top-plate height will typically be some multiple
of 50mm So a lot of the cutting for studs, and blocking is at multiples
of 5mm. that\'s if you\'re not using pre-fabricated framing.
Carpenters use millimeteres. they say centimeters
are for tailors, and inches are for cobblers.
--
Jasen.
J
Jasen Betts
Guest
On 2020-07-16, Cydrome Leader <presence@MUNGEpanix.com> wrote:
sheet metal in mm (1.6mm, 0.65mm etc...)
plastic sheet in microns 40um etc.
electric wire in square mm.
fencing wire in mm diameter.
Yes, if that is the right size. buildings are usually specified in
multiples of 100mm. often multiples of 300mm or 1000mm
furniture usually in multiples of 25mm
Factory door sizes are 620mm + multiples of 50mm, but not all openings
are the right size for the factory door.
Timber sizes for dressed finger-jointed framing timber are accurate to
withion 0.5mm are are certain preferred multiples of 5mm eg: 70x35 used
mainly for non-structual walls. 90x45 used mainly for structural walls.
The stud spacing and top-plate height will typically be some multiple
of 50mm So a lot of the cutting for studs, and blocking is at multiples
of 5mm. that\'s if you\'re not using pre-fabricated framing.
Carpenters use millimeteres. they say centimeters
are for tailors, and inches are for cobblers.
--
Jasen.
In sci.electronics.equipment Commander Kinsey <CFKinsey@military.org.jp> wrote:
On Sun, 12 Jul 2020 20:21:10 +0100, Tom Gardner <spamjunk@blueyonder.co.uk> wrote:
On 12/07/20 19:01, Pimpom wrote:
On 7/12/2020 11:15 PM, Commander Kinsey wrote:
On Fri, 26 Jun 2020 05:23:31 +0100, Cydrome Leader <presence@mungepanix.com
wrote:
In sci.electronics.equipment Pimpom <nobody@nowhere.com> wrote:
My mechanical slide caliper has a resolution of 0.001 inch. This
means that it can display measurements with a precision of 1 mil,
What if your caliper had a resolution of 1 mil +/- 3 counts on the last
digit?
.....<snip>........
In America, what is a \"mill\"? In the UK, it used to mean a thousandth of an
inch, but people use it to mean a millimetre nowadays.
It\'s not a mill. It\'s mil - single l. It means, and has always meant, a
thousandth of an inch. It\'s not an Americanism.
In the UK \"mill\" means millilitre.
If you want to refer to fractions of an inch, then
it is /always/ \"thou\", i.e. thousandths of an inch.
In the UK \"mil/mill\" /never/ means 0.001\".
Yes it does. My neighbour\'s a tradesman (in Scotland) and says
\"mill/mil\" (I don\'t know which as they sound the same in speech) as
shorthand for millimetre. As in \"that kitchen unit is 600 mill wide\".
Since we don\'t use inches for such things in the UK, there\'s no
confusion.
The context there is key too. While I\'d not measure a countertop or
whatever in millimeters, it would make no sense that anything in a kitchen
would be measured thicknesses of paper.
We (in the US) use \"guage\" for wire and sheet metal. We also use \"guage\"
for measuring really thin stuff like plastic films. In the last case, it\'s
a completly different unit, but with proper context won\'t confuse anybody.
sheet metal in mm (1.6mm, 0.65mm etc...)
plastic sheet in microns 40um etc.
electric wire in square mm.
fencing wire in mm diameter.
Question for the metric woodworkers. Does anybody cut a piece of wood to
317mm or 429mm or other off numbers when building a house or handing a
door or installing a countertop?
Yes, if that is the right size. buildings are usually specified in
multiples of 100mm. often multiples of 300mm or 1000mm
furniture usually in multiples of 25mm
Factory door sizes are 620mm + multiples of 50mm, but not all openings
are the right size for the factory door.
Timber sizes for dressed finger-jointed framing timber are accurate to
withion 0.5mm are are certain preferred multiples of 5mm eg: 70x35 used
mainly for non-structual walls. 90x45 used mainly for structural walls.
The stud spacing and top-plate height will typically be some multiple
of 50mm So a lot of the cutting for studs, and blocking is at multiples
of 5mm. that\'s if you\'re not using pre-fabricated framing.
Carpenters use millimeteres. they say centimeters
are for tailors, and inches are for cobblers.
--
Jasen.
J
Jasen Betts
Guest
On 2020-07-16, Cydrome Leader <presence@MUNGEpanix.com> wrote:
sheet metal in mm (1.6mm, 0.65mm etc...)
plastic sheet in microns 40um etc.
electric wire in square mm.
fencing wire in mm diameter.
Yes, if that is the right size. buildings are usually specified in
multiples of 100mm. often multiples of 300mm or 1000mm
furniture usually in multiples of 25mm
Factory door sizes are 620mm + multiples of 50mm, but not all openings
are the right size for the factory door.
Timber sizes for dressed finger-jointed framing timber are accurate to
withion 0.5mm are are certain preferred multiples of 5mm eg: 70x35 used
mainly for non-structual walls. 90x45 used mainly for structural walls.
The stud spacing and top-plate height will typically be some multiple
of 50mm So a lot of the cutting for studs, and blocking is at multiples
of 5mm. that\'s if you\'re not using pre-fabricated framing.
Carpenters use millimeteres. they say centimeters
are for tailors, and inches are for cobblers.
--
Jasen.
In sci.electronics.equipment Commander Kinsey <CFKinsey@military.org.jp> wrote:
On Sun, 12 Jul 2020 20:21:10 +0100, Tom Gardner <spamjunk@blueyonder.co.uk> wrote:
On 12/07/20 19:01, Pimpom wrote:
On 7/12/2020 11:15 PM, Commander Kinsey wrote:
On Fri, 26 Jun 2020 05:23:31 +0100, Cydrome Leader <presence@mungepanix.com
wrote:
In sci.electronics.equipment Pimpom <nobody@nowhere.com> wrote:
My mechanical slide caliper has a resolution of 0.001 inch. This
means that it can display measurements with a precision of 1 mil,
What if your caliper had a resolution of 1 mil +/- 3 counts on the last
digit?
.....<snip>........
In America, what is a \"mill\"? In the UK, it used to mean a thousandth of an
inch, but people use it to mean a millimetre nowadays.
It\'s not a mill. It\'s mil - single l. It means, and has always meant, a
thousandth of an inch. It\'s not an Americanism.
In the UK \"mill\" means millilitre.
If you want to refer to fractions of an inch, then
it is /always/ \"thou\", i.e. thousandths of an inch.
In the UK \"mil/mill\" /never/ means 0.001\".
Yes it does. My neighbour\'s a tradesman (in Scotland) and says
\"mill/mil\" (I don\'t know which as they sound the same in speech) as
shorthand for millimetre. As in \"that kitchen unit is 600 mill wide\".
Since we don\'t use inches for such things in the UK, there\'s no
confusion.
The context there is key too. While I\'d not measure a countertop or
whatever in millimeters, it would make no sense that anything in a kitchen
would be measured thicknesses of paper.
We (in the US) use \"guage\" for wire and sheet metal. We also use \"guage\"
for measuring really thin stuff like plastic films. In the last case, it\'s
a completly different unit, but with proper context won\'t confuse anybody.
sheet metal in mm (1.6mm, 0.65mm etc...)
plastic sheet in microns 40um etc.
electric wire in square mm.
fencing wire in mm diameter.
Question for the metric woodworkers. Does anybody cut a piece of wood to
317mm or 429mm or other off numbers when building a house or handing a
door or installing a countertop?
Yes, if that is the right size. buildings are usually specified in
multiples of 100mm. often multiples of 300mm or 1000mm
furniture usually in multiples of 25mm
Factory door sizes are 620mm + multiples of 50mm, but not all openings
are the right size for the factory door.
Timber sizes for dressed finger-jointed framing timber are accurate to
withion 0.5mm are are certain preferred multiples of 5mm eg: 70x35 used
mainly for non-structual walls. 90x45 used mainly for structural walls.
The stud spacing and top-plate height will typically be some multiple
of 50mm So a lot of the cutting for studs, and blocking is at multiples
of 5mm. that\'s if you\'re not using pre-fabricated framing.
Carpenters use millimeteres. they say centimeters
are for tailors, and inches are for cobblers.
--
Jasen.