terminating 70mm swa into 3ph board, best way?

[vde-electrician]

Why was the 70mm opted for out of interest ? How long is the run ?

off the top of my head its something like 150m

 

[Leesparkykent]

yeah that looks a good method, but the swa will be on an outgoing circuit, and going into a breaker, not the incomer , sorry. large cable due to lengthy run

In that case it sounds like a horrendous design when taking installation and selectivity into account. I wouldn’t be feeding a distribution circuit that’s over 150 meters away using a mcb as it’s OCPD. I would be looking at either a fused switch, a switch fuse or an MCCB with selectivity being a major factor/consideration in the design.

 

[Leesparkykent]

Eaton Glasgow 63A 415v TPN Fused Switch, 63GNC - https://www.electricals247.co.uk/eaton-glasgow-63a-415v-tpn-fused-switch-63gnc.html?utm_source=&utm_medium=&utm_campaign=&utm_term=&utm_content=&gclid=Cj0KCQiA7briBRD7ARIsABhX8aCePus-9D541Pf4CPzo2xZLWJoDayOfdLkQcy5Nr8cPwNuC_-DaUh8aArx3EALw_wcB

Eaton MEM CSB/CSBA Spreader Boxes - Edwardes - https://www.edwardes.co.uk/en/categories/spreader-boxes


Schneider Electric MGTB1001 Terminal Block 100A - https://www.tradesparky.com/circuit-protection/distribution-equipment/mcb-distribution-board-components/schneider-mgtb1001-terminal-block-100a

Maybe something along the lines of this.

 

[Andy78]

off the top of my head its something like 150m

Got to be something wrong there then. I reckon 35mm would cut the mustard off the top of my head.

 

[vde-electrician]

Why was the 70mm opted for out of interest ? How long is the run ?

off the top of my head its something like 150m

 

[westward10]

What %vd are you using.

 

[vde-electrician]

What %vd are you using.

basing it on 5 percent (other uses). gone larger cable, as the outgoing circuits on the far board may have large runs too, so ensuring those cables can be potentially smaller

 

[westward10]

Thought you were going to say 3% which would have explained the 70.0, seriously bad idea selectivity aside already mentioned to try and terminate that size of cable to an mcb.

 

[bigspark17]

Could a suitable enclosure under the cu with 200A din connectors then use appropriate tails to main switch.

 

[westward10]

This is a circuit from the board not the supply cable to it.

 

[Wilko]

This is a circuit from the board not the supply cable to it.

Goldfish imitation in progress here ...

 

[bigspark17]

This is a circuit from the board not the supply cable to it.

The load side is connected to a cu unless ive misread it?

 

[westward10]

The load side is connected to a cu unless ive misread it?

It is supplying a board but I think the issue is the source end, I think?

 

[Toneyz]

O.P is the D.B you are want to come off located at the intake position?

 

[MJPD29]

70mm on a 63a breaker. Must be travelling some distance

Edit just seen the distance in the comments. Is 70mm still not overkill?