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 SteveFehr. 07/23/17 09:46 AM
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)
239,265 Are you busy
174,724 Re: Forum
167,104 Need opinion
Who's Online Now
0 registered members (), 57 guests, and 10 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#141227 - 07/01/04 06:41 PM flex earths  
teach  Offline
Member
Joined: Jun 2004
Posts: 15
UK
Has anyone noticed the 2004 ammendment which allows the marking of flex cpc's to identify the cpc as an other conductor. read it carefully,its in chapter 51
It sticks in the throat that after snagging central heating cylinder stats wired in 3 core, with cpc becoming phase/neutral,for years that they had it right all along!
A retrograde step perhaps?


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

#141228 - 07/01/04 08:33 PM Re: flex earths  
aland  Offline
Member
Joined: May 2004
Posts: 186
United Kingdom
Teach, Yes Noticed it and used it! Do not see a problem as long as it is sleeved with the appropriate marker for identification at either end. After all quite a lot of equipment accepting flex's these days is class 2 with no provision to connect an earth wire anyway. And they then finish up being left floating about in a connection box carrying induced voltage.


#141229 - 07/02/04 04:54 AM Re: flex earths  
Trumpy  Offline


Member
Joined: Jul 2002
Posts: 8,217
SI,New Zealand
teach,
If a flex core is identified as an Earth Conductor, it should be used as such.
If you have a need for more cores than the usual 3, get a 4 core flex.
What I'm saying is, never use an Earth conductor as anything but an Earth, it just causes confusion later on.


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

#141230 - 07/02/04 06:40 AM Re: flex earths  
pauluk  Offline
Member
Joined: Aug 2001
Posts: 7,520
Norfolk, England
The idea of re-indentifying the earth is not new.

From table B.4 of the 14th IEE Regs., 1966:

Quote
:
Colour of core of rubber-insulated flexible cable, or rubber- or p.v.c.-insulated flexible cord other than a parallel-twin p.v.c.-insulated cord (See Regulation B.58).

Phase R of 3-phase a.c. circuit: Red

Phase Y of 3-phase a.c. circuit: White (or, in a 3-core flexible cable, black with a white sleeve at the terminations)

Phase B of 3-phase a.c. circuit: Blue (or, in a 3-core flexible cable, green with a blue sleeve at the terminations)



Member Spotlight
mersadrad
mersadrad
Montreal, Quebec, Canada
Posts: 28
Joined: March 2011
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: 0.014s Queries: 14 (0.002s) Memory: 0.7598 MB (Peak: 0.8910 MB) Zlib enabled. Server Time: 2017-07-24 06:36:45 UTC