Joining 25mm SWA - two options?

Thirst · Mar 3, 2019

I was having a debate with my spark today about methods of joining above ground 3 core (E,L,N) 25mm SWA cable. We need to move the consumer unit and with it the meter tails (fused to 80A). This requires an extension of the tails as it is not possible to completely re-run them.

He said that the best way to do this would be a galv adaptable box, terminate the SWA with external glands, add a 16mm flylead and join L and N with a DP service connector box contained within.

I noted I'd seen resin filled SWA connectors used in the past and whether despite being designed for outdoor use, they could be used in such a situation as this? I know his option is best (ease of access, mechanical protection etc) but I was just wondering whether in terms of regs using such a solution above ground would present a problem?

You can see one being used here for reference:

dinger809 · Mar 4, 2019

What about a large rotary isolator with a fly lead between the armour. Also gives a means of isolation at the source of the supply for maintenance etc

davesparks · Mar 4, 2019

Thirst said:
He said that the best way to do this would be a galv adaptable box, terminate the SWA with external glands, add a 16mm flylead and join L and N with a DP service connector box contained within.

Without knowing the details of the job its hard to say for sure but this doesn't sound like the best plan. Where is the joint going to be and what sort of installation is it, domestic, commercial?

Using external glands suggests this may be an outdoor installation? In which case a solution with a higher IP rating than a modern steel adaptable box would be better. I'd also prefer crimped connections with heatshrink insulation instead of a service connector block personally.

Squid · Mar 4, 2019

telectrix said:
don't laugh/i'm just looking for a few designs for my own. . £500 for something that's going to be burnt. sod that. i'm making my own. a few quid for some old timber from the scrap, bit of craft work, couple of handles off the bog door. money saved buys a good pi$$up for my family and mates.

http://coffincompany.co.uk/wicker-coffins/autumn-gold-premium-wicker-oval-coffin

[ElectriciansForums.net] Joining 25mm SWA - two options?

Squid · Mar 4, 2019

Pre galv Steel Adaptable Box 225 x 225 x 100 - https://www.electrical-trader.co.uk/pre-galv-adaptable-box-225x225x100.html

Deleted account · Mar 4, 2019

ipf said:
What? You mean you peed on it?

I think he means he had to ge down on his knees.

KEV 1 N · Mar 4, 2019

telectrix said:
don't laugh/i'm just looking for a few designs for my own. . £500 for something that's going to be burnt. sod that. i'm making my own. a few quid for some old timber from the scrap, bit of craft work, couple of handles off the bog door. money saved buys a good pi$$up for my family and mates.

Why not have a Viking Funeral.......but in the High-Ace?

Marvo · Mar 5, 2019

I'd probably go with a resin joint if aesthetics aren't a problem. Otherwise an enclosed isolator because they're cheap(ish). I'm lazy also and a ready made enclosed isolator is less work than sizing an adaptable box and fitting DIN rail and terminals etc.

LightGEN · Mar 11, 2019

telectrix said:
don't laugh/i'm just looking for a few designs for my own. . £500 for something that's going to be burnt. sod that. i'm making my own. a few quid for some old timber from the scrap, bit of craft work, couple of handles off the bog door. money saved buys a good pi$$up for my family and mates.

Coffins | eBay - https://www.ebay.co.uk/b/Coffins/88740/bn_818580?rt=nc&LH_PrefLoc=1