I.R test on 3 phase socket?

[elephant]

hey guys,

showing my lack of knowledge again in three phase, but got my 2391 practical coming up and not sure bout this.

If there is an isolator/starter from a 3phase DB supplying a 3 phase socket, how would I go about testing it?

im presuming open the isolator and do an normal I.R test from the DB and then.....?

thanks guys.

 

[Megaohm7]

Socket would be a 'commando' type. You would need to test from the bottom of the commando socket up to the starter . I'm doing 2391 Myself in Jan, is the motor a single phase/line via a DOL ?. If motor is 3ph then is it a balanced load motor ? no neutral!! There's bound to be someone that's recently done 2391 to put me right..

 

[elephant]

there is no actual motor connected, just a 3 phase socket outlet...

 

[septiclecky]

Don't take this the wrong way but if you are asking questions like this are you sure you are ready and able to pass the course?

 

[sparkytim]

hey guys,showing my lack of knowledge again in three phase, but got my 2391 practical coming up and not sure bout this.

If there is an isolator/starter from a 3phase DB supplying a 3 phase socket, how would I go about testing it?

im presuming open the isolator and do an normal I.R test from the DB and then.....?

thanks guys.

Same as single phase circuit X 3 + Phase to each other Phase

 

[elephant]

are u suggesting i dont know what i'm talking about?!

maybe ur right.....ha

i just havent had that much experience of 3phase boards.

Anyway.... managed to pass the practical today! (not sure what that says about the centre!)

thanks ayway