Discussion in 'Electrics UK' started by SENTNATH, 17 Oct 2006.
This topic originated from the How to page called Choosing the correct size cable.
What does it mean MCM when you refer to cable size
MCM means thousand circular
mills. A circular mil is a unit of area equal to that of a circle 1 mil in
diameter. obvious really !
Thanks for your explanation.
and dont get mills confused with mm
and don't get a circular mil confused with a square mil
a mil being more usually known (this side of the pond) as a thou - ie. a thousandth of an inch.
the standard unit of size in most cases is the mil foot, a wire will have a unit size if it has a diameter of 1 mil and a length of 1 foot.
its found in American and English wire tables,avoiding decimals.
Separate names with a comma.