It has long been accepted as good practice to support cables above suspended ceilings.
Mc cable support above ceiling.
This is also new for 2017 as permission for this method of installation did not exist prior to the 2017 code cycle.
So we had a discussion at work today regarding support of 3 8 mc above a drop ceiling.
Are cable ties or ty raps allowed for supporting type mc cable in a ceiling.
This new 2017 code language also allows the electrician to install mc cable on the underside of floor and ceiling joists assuming the electrician supports the cable at every provided joist.
Independent support wires are used they shall be distinguishable by color tagging or other effective means.
Section 358 30 requires emt to be fastened within 3 feet of each box and at 10 foot intervals.
However you may have seen cables slung over suspended ceilings in a haphazard fashion and resting on the ceiling grid.
The two main reasons for this are electrical safety and fire safety.
He said however that you can support it on the support wire holding the light fixtures up since it s part of the electrical system and not part of the grid.
Mc supports and suspended ceiling wires forgive me if this has already been addressed i searched for about 15 minutes and couldn t find a previous topic.
The contractors argue that the cable must be supported above the ceiling tiles and that the owner must specify the type of support required.
Type mc cable can be unsupported where the cable is.
My co worker and i both understand that you cannot support mc with batwings to the ceiling grid wire.
Section 330 30 a provides the general requirements and permits cable ties.
Various reasons are given for this practice such as.
General consensus is that you shouldn t support mc cable from suspended ceiling wires yet i d venture a guess anyone of us who said we ve never done that might be lying but i can t find it.
The ceiling support system shall be permitted to support branch circuit wiring and associated equipment where installed in accordance with the ceiling system manufacturer s instructions.
Section 330 30 requires mc cable to be fastened within 12 inches of each box and at 6 foot intervals.
Yes cable ties are permitted.