SER in cable tray
- Thread starter stonecutter
- Start date
- Status
- Location
- Massachusetts
It applies, I have never seen anyone question it.
Would it be your opinion that if I use SE for inside feeders (and we do) that no rules in 334 apply?
wwhitney
Senior Member
- Location
- Berkeley, CA
- Occupation
- Retired
One difficulty of your interpretation, that the 338.10(B)(4)(a) phrase "installation requirements of Part II of Article 334, excluding 334.80" means only those sections of Part II of Article 334 that don't specifically refer to type NM cable, is that 334.80 itself refers to type NM cable. So since the authors included the phrase "excluding 334.80" in 338.10(B)(4)(a), it means they expect that the preceding language in 338.10(B)(4)(a) would include 334.80, i.e. that it includes sections of Part II of Article 334 that do specifically refer to NM cable.
Cheers, Wayne
For all "intents and purposes" I agree with you both. But I have a hard time with it if we get into literal interpretations.
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
I can't see it being compliant however if a cable tray is installed and all the cables installed in it are nm and ser then I really don't see why it needs to be accessible. Basically it is just an easy method to lay the cables to perhaps avoid drilling joists. Hopefully the op will chime in
- Location
- Illinois
- Occupation
- retired electrician
Because the code says so
wwhitney
Senior Member
- Location
- Berkeley, CA
- Occupation
- Retired
Can the cable tray be used as a "chase" without being subject to the requirements of 338?
Cheers, Wayne
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
Yeah-- that's the catch.. So if I install a short piece of gutter-- no ends-- as a sleeve to lay wires in then I would not have to have it accessible.Because the code says so
I see the tray as just a means to lay the wires into an keep the cables apart. I still would like top know why the tray is used.
stonecutter
Member
- Location
- Michigan
The cable tray is being used as a means of support. The construction of the deck is steel.
So, Art. 392 requires access to the cable tray. Would this requirement be for the entire span?
So, Art. 392 requires access to the cable tray. Would this requirement be for the entire span?
Exposed and accessible except through partitions and walls [392.18(E)].
stonecutter
Member
- Location
- Michigan
Thank you
wwhitney
Senior Member
- Location
- Berkeley, CA
- Occupation
- Retired
Typo, I meant article 392. Wayne
takelly
Member
- Location
- South dakota
I think that the code allows SE cable exposed in the dropped ceiling, if it is a multifamily dwelling.
334.12(A)(2) Exposed in dropped or suspended ceilings in other than one- and two-family and multifamily dwellings.
334.12(A)(2) Exposed in dropped or suspended ceilings in other than one- and two-family and multifamily dwellings.
Note the heading on 334.12 Uses NOT permitted
The way he wrote it up seems contradictory, but when you take into consideration 334.12 is uses not permitted, exposed in dropped or suspended ceilings of multifamily buildings is permitted.
qcroanoke
Sometimes I don't know if I'm the boxer or the bag
- Location
- Roanoke, VA.
- Occupation
- Sorta retired........
Here is a B Line article on the 2011 NEC on cable ladder.
http://www.cooperindustries.com/con.../cable_tray_systems/all_products/CTManual.pdf
http://www.cooperindustries.com/con.../cable_tray_systems/all_products/CTManual.pdf
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