Aico Carbon Monoxide Detectors
This official sponsor may provide discounts for members
Advertisement - Content continues below
Advertisement - Content continues below

Discuss SWA - earthing the steel wire? in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net

John R

-
DIY
Welcome to ElectriciansForums.net - The American Electrical Advice Forum
Head straight to the main forums to chat by click here:  American Electrical Advice Forum

Hi

I’m new to the forum & just a DIY’er!

I’m running a 15m length of 2.5mm 3 core (twin & earth) SWA to our decking at the back of the garden for a double socket.

Must the steel wire armour be earthed using the banjo or is the CPC core sufficient?

Thanks in advance!

J
 
Aico 3000 Range
This official sponsor may provide discounts for members
Advertisement - Content continues below
S

Silly Sausage

Yes, it must be Earthed.
Make sure you use the correct glands, properly, as well
 

SJD

-
Mentor
Arms
Esteemed
Yes, the steel armour must be earthed. Use the correct gland, rated for the location, and either the banjo or a piranha nut.

So that if someone digs through the cable, the armour cannot become live.
 

telectrix

-
Mentor
Arms
Esteemed
the armour must be earthed at the source end even if you have a separate cpc conductor.
 

Midwest

-
Arms
Esteemed
Alright, that’s four of you that said it must be earthed. Thought someone might have added something else to the discussion.
 

telectrix

-
Mentor
Arms
Esteemed
Alright, that’s four of you that said it must be earthed. Thought someone might have added something else to the discussion.
i can add loads to the discussion.....

1. why do you ask when it's clear in BS7671?
2. is it being installed by a competent sparks?
3. where's my beer? (this Q for missus, as she's only doing washing, ironing, washing up, dusting, cleaning, women say they can multi-task, so why my beer not within reach?
 

SJD

-
Mentor
Arms
Esteemed
Alright, that’s four of you that said it must be earthed. Thought someone might have added something else to the discussion.
What would you have liked adding? The OP didn't ask about anything else, e.g. RCD protection, etc.
 

Taylortwocities

-
Arms
Esteemed
Advent Win
I’m running a 15m length of 2.5mm 3 core (twin & earth) SWA to our decking at the back of the garden for a double socket.
I'll add a bit more.
SWA cable is not "twin and earth". SWA cable is 2,3,4 core etc. All cores are separately insulated. You may choose to use one of the cores for earth. Or you could use the steel armour (subject to a number of tests, calculations and checks) as the earth.

The flat stuff that is used for fixed wiring inside a house , like this

is twin and earth.
 

John R

-
DIY
  • Thread Starter Thread Starter
  • #12
Thanks for the decent answers. I made it perfectly clear that I am a DIY’er. I realise that there are a BC & wiring regulations but I cannot justify the £££ needed to purchase them.

I also realise that I need RCD protection and that the cable needs to be buried 500mm down with the plastic warning tape less deep.

I know what traditional ‘twin & earth’ is...what is this then?

SWA Single Phase Armoured Cable - https://www.toolstation.com/swa-single-phase-armoured-cable/p57367#full-desc

If everything is clear in the regs then why have a forum for advice?
 

Spoon

-
Mentor
Arms
Esteemed
Welcome to the forum mate.
I presume you know this work is notifiable, under Part P?
I take it that you will be notifying them. I've been told that this will cost a bit.
 

Pete999

-
Arms
Esteemed
Thanks for the decent answers. I made it perfectly clear that I am a DIY’er. I realise that there are a BC & wiring regulations but I cannot justify the £££ needed to purchase them.

I also realise that I need RCD protection and that the cable needs to be buried 500mm down with the plastic warning tape less deep.

I know what traditional ‘twin & earth’ is...what is this then?

SWA Single Phase Armoured Cable - https://www.toolstation.com/swa-single-phase-armoured-cable/p57367#full-desc

If everything is clear in the regs then why have a forum for advice?
Because BS7671 "The Regs" are a right PITA for electricians to understand, let alone Joe Public, sometimes the voice of reason is better understood.
 
Aico Carbon Monoxide Detectors
This official sponsor may provide discounts for members
Advertisement - Content continues below

Reply to SWA - earthing the steel wire? in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net

Test Meter - Forum Sponsors since 2007!
This official sponsor may provide discounts for members
Advertisement - Content continues below
Top Bottom