Carp lyrics but 10 out of 10 for the sentiment.
Last edited by a moderator:
To increase the surface area of the gland , is what we were told . Its strange you say that , I , and anyone I know in the trade since the 1960's have never seen them on the inside ....perhaps it changes by location . :C
There are a few anomalies that you come across perhaps once only .
One I always quote was a hospital wards refurb we did ...the spec demanded the use of , when coupling to a surface box...a flanged coupler ( steel conduit) complete with long reach 20mm bush with a serrated washer on it .on the inside ....and a lead washer between the flange & the box . All very well but never , ever did it again .
This was B/E conduit but theres a Google picture so someone must still use them ...shows the lead washer but not the serrated washer.
View attachment 9662,,
Back to the op, what about street lighting cutouts, no glands & a jubilee clip round the swa. I was taught a similar method, on my apprenticeship, slipping a pipe under the swa and a jubilee clip in certain tight areas,
Their method of making off SWA was the usual way , row of armoureds in the top of a panel ....then about 6 - 8 inches above the gland they cut a band of PVC out of the sheaths about 20mm wide and strap all the SWA 's together with copper strip clamped onto the armouring . :C
Who was that then Tony ? This was British Gas . Can't say I ever saw it done until the 1990's .Very common back in the 60's.
Its as pointless as those PVC conduit adaptors with a moulded boss on the side . Apparently its for a self tapper to fix an earth lug to :CI can think of a couple of companies I’ve worked for that used copper tape between SWA’s. It doesn’t mean I agree with the method. When I first saw it used I couldn’t see the point of it and I still can’t.
Well I actually thought it was for sticking a self tapper in to "lock" the conduit in the "style of the 'American system " where they do not thread the conduitIts as pointless as those PVC conduit adaptors with a moulded boss on the side . Apparently its for a self tapper to fix an earth lug to :C
I think you can buy a terminal to push fit into it for joining the earth wires togetherIt could be that .... I just remember asking and thats what I was told . I'm surprised they still do that moulding TBH . Hey! Thinking about it ... isn't there a boss in the PVC conduit boxes for "earthing" ?
No CU change required, gland the SWA into the enclosure as normal, use a Piranha lock nut and earth the Armour via a suitable size lead from the nut to the earth bar, as you normally wouldI suppose it's academic now as if installing a new circuit in SWA to a CU, it seems the current regs would require a change of said CU to metal clad anyway. Is that correct?
I am a bit rusty lol!!
Enter your email address to join: