SWA For meter tails?

[Msitekkie]

I need to upgrade my meter tails to 25mm. The existing tails pass along under the pebble dash in plastic conduit (which would be too small), then apparently at an angle through the porch structure (unprotected) then turn sideways into a void & up the void to CU.

I have seen other posts where the use of SWA is suggested but I haven't actually seen SWA with 25mm cores. "25mm SWA" appears to be 25mm "Outside diameter", so I presume that means the cores are smaller.

Any suggestions as to the best approach welcomed. I actually think I will struggle with getting SWA through anyway even if it does exist with suitable cores, because of the bends involved.

NB The meter box is under the window of the house rather than on the side of the porch, but the void inside the porch is set back behind the run of the outside wall so it's not possible to drill directly through the outside porch wall into it.

 

[Msitekkie]

Think of peak times morning evenings when most load will be consumed should only be short periods when applying diversity,
a bs88-3 (new bs number for 1361) will take 190a for half hour fig 3A1 bs1761
/QUOTE]
Thanks for that. Fig 3A1(page 319) is most illuminating. Few discussions of diversity refer directly to this time factor and its clearly very relevant.

 

[Msitekkie]

Think of peak times morning evenings when most load will be consumed should only be short periods when applying diversity,
a bs88-3 (new bs number for 1361) will take 190a for half hour fig 3A1 bs1761

Thanks for that. Fig 3A1(page 319) is most illuminating. Few discussions of diversity refer directly to this time factor and its clearly very relevant.

 

[Msitekkie]

PPP

Post pictures please

 

[Midwest]

That is a bit of a lash up, what you want is a bit of swa cable

Could the tails be routed out the back of the meter box, then surface inside in some plastic trunking?

 

[Pete999]

That is a bit of a lash up, what you want is a bit of saw cable

Could the tails be routed out the back of the meter box, then surface inside in some plastic trunking?

saw cable?

 

[Midwest]

saw cable?

Thanks Pete

 

[Pete999]

Thanks Pete

Your welcome.

 

[Mjgriff82]

I would consider using a 16mm split concentric chopped in the wall Covered by an earthed 3mmsteel plate covering, from the incomer connected to a kmf isolator

 

[Msitekkie]

If it's SWA why would I use surface trunking? The problem I'm facing really, is once it reaches the porch getting it through the brickwork and wooden beam to the void. Ironically the supply to the meter appears to originate from somewhere under the concrete floor inside the porch, but moving the meter inside isn't really an option.

 

[davesparks]

If it's SWA why would I use surface trunking? The problem I'm facing really, is once it reaches the porch getting it through the brickwork and wooden beam to the void. Ironically the supply to the meter appears to originate from somewhere under the concrete floor inside the porch, but moving the meter inside isn't really an option.

Trunking looks a little nicer than cleated SWA.

To get through the brickwork and wood drill a hole.

It’s not really ironic, it’s just probably been moved outside from it’s original location inside.

 

[Pete999]

saw cable?

Why is it Old Lee?

 

[Midwest]

If it's SWA why would I use surface trunking?

I was suggesting an alternate to swa, some 6181y and surface plastic trunking?

 

[Msitekkie]

I was suggesting an alternate to swa, some 6181y and surface plastic trunking?

OK. Yes, looks like this is the way I'm going to go, then straight through the wall and cut a channel round the outside of the brick pillar (inside the porch), through into the void.

 

[davesparks]

OK. Yes, looks like this is the way I'm going to go, then straight through the wall and cut a channel round the outside of the brick pillar (inside the porch), through into the void.

When you say cut a channel you don’t mean to bury the tails in the wall do you? Because then they’d need RCD protection which would be unacceptable.

 

[Msitekkie]

When you say cut a channel you don’t mean to bury the tails in the wall do you? Because then they’d need RCD protection which would be unacceptable.

In conduit.