What size cable do I need?

[electricshock]

To give you a hint. For single phase im getting around 95mm for it

95mm cable size can't be right

 

[shanky887614]

95mm cable size can't be right

Thats for single phase you berk. Your machine will be 3 phase so take a lot smaller cable.

It's not worth even telling you as you don't apear to be competent.

This kva question is one you would exspect your average apprentice to easily manage.


And you might need 95mm it depends on many factors including the length of the run

 

[electricshock]

32mm for each phase

 

[shanky887614]

32mm for each phase

Plummber by any chance. Ive never seen a cable that size

 

[electricshock]

That's minimum size so I will need to get next size up from it. 35 I think

 

[electricshock]

That's only if the figures 75 kva and 22kw are correct. I need to get the exact details of the machine.

 

[shanky887614]

That's only if the figures 75 kva and 22kw are correct. I need to get the exact details of the machine.

Hold on a min? When did I mention 22kw?


22kw has nothing to do with my calc.

I think you need to actually get your books out and do some calculations

 

[trev]

Hold on a min? When did I mention 22kw?

You didn't, he did many many pages ago

 

[electricshock]

When I did quick check on specs. It said 75kva total power. Somewhere in there it said 22kw rating

 

[Darkwood]

If a machine is 3ph and asks for 75kva its per phase but having said that some far east machine can be labled different as they dont comply to our markings

 

[guest119]

The lad doesnt seem to be listening to what he doesnt want to hear DW.
Seems to be grasping at snippets of info to try to get the answer without doing or being able to do the calcs.

Boydy

 

[Darkwood]

I believe I need 6mm cable. But I'm going to get the full specs first.

seriously pass this job on this is a 3 phase 75kva industrial supply not a domestic shower .... i tried help but your not helping yourself and showing calcs

 

[shanky887614]

If a machine is 3ph and asks for 75kva its per phase but having said that some far east machine can be labled different as they dont comply to our markings

if skelton is right and there power factor is 0.3

they have much bigger problems!!!

ironically 104amp is around the right mark when you factor in the power factor skelton mentioned


if he doesn't sort the pf of the place out first he will need a cable 10 times the size he could have otherwise gotten away with

 

[electricshock]

seriously pass this job on this is a 3 phase 75kva industrial supply not a domestic shower .... i tried help but your not helping yourself and showing calcs

I worked it out using 22kw.

 

[electricshock]

The lad doesnt seem to be listening to what he doesnt want to hear DW.
Seems to be grasping at snippets of info to try to get the answer without doing or being able to do the calcs.

Boydy

How many times do I have to say. I'm going to get the full details first and then work it out.