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#114961 - 07/23/03 12:25 PM Why is the cable taped?  
Admin  Offline

Joined: Oct 2000
Posts: 3,458
Submitted by Joe Tedesco:

[Linked Image]
Why is the cable taped? This is in a kitchen in a hotel

Joe Tedesco

[This message has been edited by Webmaster (edited 07-23-2003).]

Tools for Electricians:

#114962 - 07/23/03 01:49 PM Re: Why is the cable taped?  
ThinkGood  Offline
Joined: Aug 2002
Posts: 1,081
Milwaukee, WI
Looks to me as though the correct connector was not used--it's meant for NM cable, not type AC or type MC. (Although, there are dual-purpose connectors, correct?)

Also, it's possible they didn't use a bushing ("redhead") which should be visible.

How is the box containing the GFCI receptacle supported, by the way?

Also, is the MC cable properly supported?

#114963 - 07/23/03 05:18 PM Re: Why is the cable taped?  
iwire  Offline
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
This is something I get after coworkers about, although usually in larger sizes because the connector is not gripping the armor. [Linked Image]

I agree with Think Good here.

Either they had no antishort bushing and used tape in place of it or they had an antishort bushing and needed tape to hold it in place due to the use of a NM connector.

When I tell coworkers not to do this they always will tell me that MC armor is not a grounding conductor and that the box is grounded by the insulated grounding conductor in the MC.

What they seem to overlook is that the armor is a metal raceway that needs to be bonded/grounded.

Bob Badger
Construction & Maintenance Electrician

#114964 - 07/23/03 05:51 PM Re: Why is the cable taped?  
Gus1999  Offline
Joined: Dec 2002
Posts: 24
Los Angeles, CA, USA
Couldn't find a IG GFCI?

#114965 - 07/23/03 06:19 PM Re: Why is the cable taped?  
Bjarney  Offline
Joined: Apr 2002
Posts: 2,527
West-Southern Inner-Northeast ...
Must be one of those cutting-edge hepcat IG-Ultra systems there's been so much buzz about. ;-)

[Oops. That takes orange tape.]

[This message has been edited by Bjarney (edited 07-23-2003).]

#114966 - 07/24/03 09:16 AM Re: Why is the cable taped?  
PCBelarge  Offline
Joined: Jun 2003
Posts: 681
Dobbs Ferry, NY, USA
Hey! That tape for an IG is a great idea, wish I had thought of that. LOL!


Pierre Belarge

#114967 - 07/24/03 01:29 PM Re: Why is the cable taped?  
ThinkGood  Offline
Joined: Aug 2002
Posts: 1,081
Milwaukee, WI
The screws don't appear to be nylon, though... [Linked Image]

#114968 - 07/27/03 02:26 PM Re: Why is the cable taped?  
SvenNYC  Offline
Joined: Aug 2002
Posts: 1,691
New York City
Yeah, that certainly doesn't seem to be a BX-type cable clamp. The ones I've seen in a certain DIY warehouse are roundish barrels with a set-screw to clamp on the metal jacket and a lock nut for the box.

The opening at the end where the wires exit is designed to hold the red bushing in place.

And yes. They're packed in clearly marked bags that have BX Connector or some such thing printed on them. [Linked Image]

#114969 - 07/27/03 08:43 PM Re: Why is the cable taped?  
sparky  Offline
Joined: Oct 2000
Posts: 5,311
i belive there still exists two-screw amored cable connectors on the market, although they have fallen out of vouge.

a redhead is debatable here, i believe it would depend on the conn. listing, but i'm unsure

the cable sheath here is not a grounding conductor, i would however prefer it grounded.

#114970 - 07/27/03 09:48 PM Re: Why is the cable taped?  
wa2ise  Offline
Joined: Nov 2002
Posts: 784
Oradell NJ USA
There's a kind of "BX" cable that has an aluminium sheath. Instructions and notes that come with it insist that you not use the "setscrew" clamps. But a style clamp that squeezes the sheath, similar to the clamp in the picture.

Anyone ever have the aluminium sheath to clamp connection fail when a serious fault current happened? I'd think you could get a bad connection due to corrosion of the aluminium.

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