ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Potseal 11
Recent Posts
600 KW 120/208 3 Phase Y protection
by Yooperup. 07/24/17 12:20 PM
1913 American Electrician's Handbook
by gfretwell. 07/20/17 01:08 PM
Green House wiring
by ghost307. 07/20/17 09:10 AM
Permit Snafus...AHJs and Contractors Jump in
by HotLine1. 07/18/17 08:06 PM
New in the Gallery:
SE cable question
Popular Topics(Views)
239,316 Are you busy
174,783 Re: Forum
167,153 Need opinion
Who's Online Now
0 registered members (), 75 guests, and 8 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#140716 - 04/23/04 06:45 AM Do You Pre-Test?  
Trumpy  Offline


Member
Joined: Jul 2002
Posts: 8,217
SI,New Zealand
This question only came about after a really bad day, today Fault-finding a 400V 3 Core + Neutral Screened Cable, laid the other day.
A guy that I do quite a bit of work for asked me if he could lay his own cable, if I stipulated the cable and the installation methods.
No worries I said, he rang me later to look at the cable before it was finally buried and I had no problems with it.
In hind-sight, I should have Meggered the darn thing!. [Linked Image]
Went to hook up the cable (feeding a 3-phase pump) and tested the cable, I had a Dead-short over all 3 wires and to the Screening.
I eventually located the short to a section of cable that was buried .
I put a Tone Beacon down the cable and found the Fault, and dug up the damaged section, only to find a nasty piece of cable,that seemed a wee bit thinner than the rest of the cable.
I never had my D-cam, so I have no evidence of this.
It was just like it had been stretched during manufacture, in one place.
OK, so do you guys, pre-test cables, on the drum, before you install it?. [Linked Image]


Let's face it, these days if you're not young, you're old - Red Green grin

Test Equipment:
Large Selection of Test Equipment For Electrical, HVAC, Test & Measurement
Large Selection of Test Equipment For Electrical, HVAC, Test & Measurement

#140717 - 04/23/04 07:14 PM Re: Do You Pre-Test?  
pauluk  Offline
Member
Joined: Aug 2001
Posts: 7,520
Norfolk, England
I don't think I've ever pre-tested on the reel, although I have meggered out a cable after laying but before terminating the ends.

Maybe the guy crushed it during the install and either didn't realize, or didn't think it was important.


#140718 - 04/25/04 12:27 AM Re: Do You Pre-Test?  
twh  Offline
Member
Joined: Mar 2004
Posts: 916
Regina, Sask.
I only test if something looks wrong. The cable is tested on the reel before it leaves the factory. At least, it was at the place I visited. It sounds like a good idea, especially with a large cable or long run that would be difficult to roll up. I should start doing it.

I'm impressed that you got a fault locater to work. It must be a skill that I'm lacking.


#140719 - 04/25/04 06:55 AM Re: Do You Pre-Test?  
Trumpy  Offline


Member
Joined: Jul 2002
Posts: 8,217
SI,New Zealand
twh,
Welcome to the Forum mate!. [Linked Image]
Pleased to have your input here!
Off the Drum, I would not normally test, but this was a wake up call and a half.
Won't be doing that a second time. [Linked Image]


Let's face it, these days if you're not young, you're old - Red Green grin


Member Spotlight
BEAMEUP
BEAMEUP
WA
Posts: 27
Joined: December 2004
Show All Member Profiles 
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.010s Queries: 14 (0.002s) Memory: 0.7614 MB (Peak: 0.8939 MB) Zlib enabled. Server Time: 2017-07-25 04:36:38 UTC