SWA main supply questions.

[SSE]

Couple of questions. I’m at a job just now where the existing tails from the meter needed upgraded, they were 15m away from the fuse board & weren’t of an adequate size. The customer has already run a 3-core 25mm SWA to existing fuse board which will be upgraded to a 17th Edition consumer unit. Could do with a couple of bits of advice, first is regarding the termination of SWA at consumer unit. What’s the easiest & neatest way to do this? It’s a Wylex split load consumer unit he has bought. Looks like it may be a bit tight to fit gland straight to box & the earth won’t fit in the earth bar terminal. I’ve seen over the years different variations with gland attached to adaptable metal boxes but some are not the neatest. Also currently at the meter side there’s an old isolator, one of those with the big handles, what does this need to be replaced with to meet new regulations?

 

[Andy78]

Best way would have been to use 16mm, but seeing as it's already in then you could use reducing pins.
If it's a bit tight to gland to then it is not really suitable. Glanding into a small chamber underneath won't really afford you any more space as the supply conductors have to enter the unit some way.
What is wrong with the isolator regarding current regulations ?

 

[Pete999]

Couple of questions. I’m at a job just now where the existing tails from the meter needed upgraded, they were 15m away from the fuse board & weren’t of an adequate size. The customer has already run a 3-core 25mm SWA to existing fuse board which will be upgraded to a 17th Edition consumer unit. Could do with a couple of bits of advice, first is regarding the termination of SWA at consumer unit. What’s the easiest & neatest way to do this? It’s a Wylex split load consumer unit he has bought. Looks like it may be a bit tight to fit gland straight to box & the earth won’t fit in the earth bar terminal. I’ve seen over the years different variations with gland attached to adaptable metal boxes but some are not the neatest. Also currently at the meter side there’s an old isolator, one of those with the big handles, what does this need to be replaced with to meet new regulations?

The SWA pulled in already, does that mean they have installed aSWAwith an extra conductor, or are they intending to use the armouring as the earth?

 

[DPG]

Says 3 core SWA Pete.

 

[Octopus]

Why do people let random customers select products .....

 

[Midwest]

I've terminated 25mm swa (3c) into metal CU (MK 12 way) fairly easily. Used copper pin terminals for the earth conductor, as Andy suggested.

 

[Midwest]

Also currently at the meter side there’s an old isolator, one of those with the big handles, what does this need to be replaced with to meet new regulations?

Depends on who the isolator belongs to?

 

[DPG]

Replace with metal-clad switch-fuse?

 

[Pete999]

Says 3 core SWA Pete.

Oh cheers missed that bit

 

[Spoon]

Is it me or am I missing any mention of 'fused insolator"...

 

[Midwest]

Good point and well spotted....smart arse

 

[MJPD29]

Is it me or am I missing any mention of 'fused insolator"...

Maybe the old isolator is fused... who knows

 

[DPG]

Is it me or am I missing any mention of 'fused insolator"...

I mentioned it - see post #8.

 

[DPG]

Oh cheers missed that bit

My key skill is observation. Observation and accuracy. Err, my two key skills are.... etc. etc.

 

[Spoon]

I mentioned it - see post #8.

You did mate. I saw your post pop up as mine was being posted.