Joining 4 x 10mm conductors?

[loz2754]

The SY cable may well be sized correctly for 3 phase but would need to be bigger obviously for single phase as the neutral will be carrying the full current. Did someone already mention this? I'm going a bit senile.....

 

[Lucien Nunes]

Yes. There was a previous thread about calculating the load, which could have gone like:
'12000/230=52 and 52/3=17.4, check that each element bank is somewhat below 230/17.4=13.5Ω, if so kiln is indeed 12kW as suspected, supply current on single phase is 52A, job done' but rambled on a bit. Somewhere along the way the point surfaced a few times.

 

[ipf]

I find, with SY cable, the size can be surprising. 4mm can look like 2.5, 6.0mm like 4, etc.

Could be because it's flexible.......and not manufactured to any British or European standard, as far as I know.
Isn't it intended as a control cable?.... although 10mm 4c, with such colours as control only, it seems like supply cable. You'd think it would be the all black, numbered cores as controls.
Different manufacturers, different specs, maybe?

 

[Mike Johnson]

Or use one on these from RS Components, I have a couple spare if you want one?

Legrand, 4 Pole Interface Module, DIN Rail Mount​

Can't get the link to work, but go to there web site and look for the above, they are a very neat three phase enclosed connector.

 

[Mike Johnson]

Try again: 0 048 84 | Legrand, 4 Pole Interface Module, DIN Rail Mount | RS Components -

 

[DPG]

Or use one on these from RS Components, I have a couple spare if you want one?

Legrand, 4 Pole Interface Module, DIN Rail Mount​

Can't get the link to work, but go to there web site and look for the above, they are a very neat three phase enclosed connector.

They look nice.

 

[Mike Johnson]

They also manufacture a bigger unit, ideal for a three phase board: 0 048 88 | Legrand, 15 Pole Interface Module, DIN Rail Mount | RS Components - https://uk.rs-online.com/web/p/interface-modules/6203665/

And lots of others: Interface Modules | Passive & Relay Modules | RS Components - https://uk.rs-online.com/web/c/connectors/terminal-blocks/interface-modules/

 

[Lucien Nunes]

Although in this case only 2 pole needed, as it's going onto a single phase supply.

 

[Mike Johnson]

Agreed, but there are plenty of others on the site I posted the link too that will accommodate that.

 

[Vortigern]

Usually on dual types of supply like that i.e. three phase/single phase, there is a plate inside the equipment that lets you configure the wiring for single phase supply or three phase, so that you get a two core and earth supply and reconfigure the links inside the appliance rather than try to link one single phase wire to the five core cable. So at your switch you would have a cable coming out from say a rotary isolator straight to the appliance. From there you would have a cable that would go directly to the links. Configuring the links is key to this. Or...three phase rotary isolator and the five core goes into that with a link to each of the L1-L2-L3 at the supply side. I suspect you need to link at where that five core goes to and inspect the arrangement. I have been caught out by this before by assuming the links were configured for three phase and they weren't. So you would need to see how the links are configured and be sure you are linking in properly.