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#112156 - 04/17/01 06:35 AM Threadbare SE Cable - What are the Dangers?
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What would say the issues and/or dangers here are?

Bill
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#112157 - 04/17/01 07:17 AM Re: Threadbare SE Cable - What are the Dangers?
sparky66wv Offline
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Registered: 11/17/00
Posts: 2232
Loc: West Virginia
I find this problem a lot and would appreciate some ammo for my arguments to replace such worn SE cable.

The "general public" consensus seems to be:

"Oh, it's just a ground wire..."

The local fire department had such an SE cable that had corroded to the point that only a few strands of the neutral were still connected. Ironic isn't it?

My guess is that corrosion is allowed to progress with the help of oxidation and UV light; eventualy to the point of a failed neutral before anyone does anything about it. (Then, of course, it's too late for some appliances..."why didn't you warn me?" they'll say...hmmmmm.)
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#112158 - 04/17/01 02:13 PM Re: Threadbare SE Cable - What are the Dangers?
Tom Offline
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Registered: 01/01/01
Posts: 1044
Loc: Shinnston, WV USA
The biggest problem I've had with cables like this is that they are no longer raintight. Water wicks down the cable & frequently starts the lugs in the meter corroding. I've also seen it continue past the meter & go down the cable to the service disconnect in the basement & rot out the lugs there.

If you need a code citation, try 300-12

Tom
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#112159 - 04/17/01 03:05 PM Re: Threadbare SE Cable - What are the Dangers?
Bill Addiss Offline
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Registered: 10/07/00
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Loc: NY, USA
What about possible shock hazards?

Bill
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#112160 - 04/17/01 03:39 PM Re: Threadbare SE Cable - What are the Dangers?
sparky66wv Offline
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Registered: 11/17/00
Posts: 2232
Loc: West Virginia
Yeah, I've seen lots of discos with rotting CB's even with the SE intact and the proper raintite connector used... This is of course when the disco is directly below the MB. I can easily see where this would aggravate the existing sealing problems.

Good Q Bill, what about the shock hazards?...
It's grounded but carrying lots of current...
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#112161 - 04/17/01 03:54 PM Re: Threadbare SE Cable - What are the Dangers?
sparky Offline
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Registered: 10/18/00
Posts: 5303
these are everywhere ! the only thing missing is the semi-bare conductors out of the head, and the arc-welds from clacking together in the wind.

must be why that 'sunlight resistant' code was made [ 310-8(d)]

i point this sort of disaster-in-progress out when on service calls, etc. i usually ask them to ask any local sparky for a 2nd opinion.
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#112162 - 04/17/01 04:32 PM Re: Threadbare SE Cable - What are the Dangers?
Bill Addiss Offline
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Registered: 10/07/00
Posts: 3875
Loc: NY, USA
As Tom pointed out, from what I see, one result of this condition is the entrance of water into the Meterpan which drips on the central Neutral lug an eventually rusts it away. If Panelboard is in Basement it gets water in it possibly damaging the Bus and/or Main Breaker.

To most this would seem to be a shock or fire hazard ... is it?

Bill
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#112163 - 04/20/01 07:13 AM Re: Threadbare SE Cable - What are the Dangers?
sparky66wv Offline
Member
Registered: 11/17/00
Posts: 2232
Loc: West Virginia
I would imagine fire would be the biggest concern if the neutral lug (or other connection of the neutral) allowed the infamous 240V series to smoke a few appliances.

Ground reference may be lost in places with poor soil, and poor grounding.

Someone in a panic to unplug said smoking appliances could be hurt by burn or electrocution.

Just MHO...

Any additional comments?

-Virgil ('66)
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#112164 - 04/20/01 12:59 PM Re: Threadbare SE Cable - What are the Dangers?
wayne Offline
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Registered: 04/04/01
Posts: 54
Loc: NC
Its obvious that this service was installed a long time ago. And yes as the person that did the remodeling, siding, facier board trim. They most likely did not resecure the entrance cable.

This however is a serious problem. Not to mention Shock, as well as damaging equiment ect.

I think they should have some sort of inspection from time to time, especially in the older sections. I know that the inspection Department know that this type of thing is going on. They condem building for safty reasons ect.

I beleive a lot of the problems we have exisiting today is because of lack of concern.

Wayne,
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#112165 - 05/12/01 06:36 AM Re: Threadbare SE Cable - What are the Dangers?
cinkerf Offline
Member
Registered: 12/03/00
Posts: 84
Loc: Pittsburgh, Pennsysvania. ...
Can someone explain the shock hazard to me. I don't doubt that there is one. I just don't understand the theory behind it. The grounded neutral is also bonded to the ground rod which is driven in the earth. Wouldn't it be the same as a person touching the bare #6 awg grounding electrode conductor which is installed from the service panelboard to the ground rod? There is no shock hazard with that example.

Frank (cinkerf)
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