On Monday, 30 July 2018 23:48:21 UTC+1, ARW wrote:
On 28/07/2018 12:29, tabbypurr wrote:
On Saturday, 28 July 2018 09:20:44 UTC+1, Scott wrote:
On Fri, 27 Jul 2018 21:27:45 +0100, Harry Bloomfield
wrote:
After serious thinking Scott wrote :

Would there be an argument for putting both leads into the same side,
so each terminal has two wires going into it, then the wires are in
physical contact and the space is better filled?

Always aim to as near as possible fill the space in a connector, to
minimise resistance. Sometimes you can put two wires in from opposite
ends and long enough to be caught by both screws. Sometimes you can
feed both in from one end. The idea is to minimise the current flowing
through the connectors metalwork, by having the copper side by side.
Fold them over too, if you possibly can.

Does this mean you can use a smaller connector block to ensure a good
fit, on the basis that if the wires are in contact there is no current
flowing through the connector block?

With domestic mains wiring no, the connector must be rated as required. If you were designing an appliance and the connections were always done this way, a downrated connector could be justified. Though if you think no current would flow through then you're not skilled enough to do that.

Can you use a 20A junction box on 32A final ring circuit to join two
cables together?

Physically you can use all sorts of things, but it ain't compliant on a 32A circuit.


NT