Conduit And Trucking Flashcards
Conduit and trunking
Where cable trunking or busbar passes through a ceiling it must contain
A fire barrier
The conductor contained in a busbar trunking are usually
Bare copper or aluminium bars
Under floor trunking or ducting may be used for
All types of circuits were segregated
A gromet is used on a metal box to
Protect cables from sharp edges
When would a running coupler be used
When neither tube can be rotated
What tool is used to thread steel conduit
Stock and die
Flexible metalic conduit may be used as a circuit protective conductor
Never
What tools do you use to help bend PVC conduit
Bending spring
What percentage of steel trunking must be free from cables
55%
What is the purposes of segregated trunking (data trunking)
So seperate different categories of cables
Where steel trunking is connect together what must be attached to the trucking
Copper straps
What should be used on exposed threads on steel conduit
Galvanized paint
Name one advantage of steel conduit
Can be used as protective conductor CPC
One advantage of plastic conduit
Resistant to corrosion
Why should all cables for a circuit should be drawn into the same steel conduit
To reduce eddy currents
