red devil...?

[blue spark]

I agree, though, that for most applications of 50 V and above, this stuff really doesn't jive. Don't make fun of it too much though; you always find yourself in a situation one day where you are glad that they manufacture something you used to laugh at! (you all know this is inescapably true for some product or another)

Slab on grade on ledgerock. Welcome to Northern Minnesota.

 

[bstoin]

Wow you guys have really run with this. I got my answer and hadn't checked back for a few days.

The original question was sparked by a customer of ours (we manufacture cable) who was getting pestered by an inspector who wanted red devils installed on our MC cable. The customer wanted to know if they were required since they had already installed the cable without them. I sent them that pdf document and haven't heard anything back.

After reading this thread, it certainly seems that it is better to just go ahead and install them whether they are required or not. Better safe than sorry.

I would agree with the "better safe than sorry" approach, but the inspector should be informed that these "little red thingys" are a code requirement for AC but not for MC.
But I too, have a little trouble accepting this as I have seen shorts caused by the sharp edge of MC cutting into the insulation on the conductor.

 

[russ]

Did You Know?
The NEC Requirements For Use Of Anti-Short Bushing

November 1, 1998

Anti-Short Bushing

When installing ARMORED CABLE (Type AC), NEC article 333-9 mandates the use of a insulating bushing (commonly referred to as Anti-Short or Redhead) between the metal sheath and the conductors. Fittings with insulated throats are not a substitute for the anti-short bushing. Always use UL listed anti-short bushings, Bridgeport cat. nos. 1000 through 1008.

When installing METAL-CLAD CABLE (Type MC), the NEC does not require the use of a Anti-Short insulating bushing. MC cable conductors are usually wrapped with mylar tape for protection, use of anti-short bushing is optional unless specified otherwise by the cable manufacturer.






Note: Above comments are not an interpretation of the National Electrical Code (NEC) or local regulations. Always consult your local electrical inspector for requirements in your area.

Please send your comments and questions to attn: Engineering at Bridgeport Fittings, Inc., Phone 203.377.5944, Fax: 203.381.3488 or email: eng@bptfittings.com

 

[russ]

I ordered 3/8 flex connectors and got what ever was on the supply house shelf. Often the connectors I got weren't listed for the flex I was using.