The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Featured:

2017 NEC and Related
2017 NEC
Now Available!

Recent Posts
Safety at heights?
by HotLine1
Yesterday at 08:51 PM
International Wire Colour Codes
by Texas_Ranger
Yesterday at 03:29 PM
Looking for older post
by Texas_Ranger
Yesterday at 03:22 PM
Last time to chat here
by Trumpy
01/20/17 11:41 PM
Unsafe Situations
by Trumpy
01/20/17 09:46 PM
New in the Gallery:
Desk-mounted "power-board"
Shout Box

Top Posters (30 Days)
Admin 35
HotLine1 20
Ruben Rocha 17
gfretwell 16
Trumpy 15
Who's Online
1 registered (HotLine1), 165 Guests and 10 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#141227 - 07/01/04 03:41 PM flex earths
teach Offline
Member

Registered: 06/28/04
Posts: 15
Loc: 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?

Top
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 05:33 PM Re: flex earths
aland Offline
Member

Registered: 05/20/04
Posts: 187
Loc: 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.

Top
#141229 - 07/02/04 01:54 AM Re: flex earths
Trumpy Offline


Member

Registered: 07/05/02
Posts: 8560
Loc: 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

Top
#141230 - 07/02/04 03:40 AM Re: flex earths
pauluk Offline
Member

Registered: 08/11/01
Posts: 7693
Loc: 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)

Top


ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals