min csa of live conductors

[paulthemagpie]

hello peeps,

I could do with some help. And i will greatly be appricated to egt the help.

What is the min CSA of live conductors suitable for CCC and voltage drop for the following:

a. 3kw, 230v water heater
b. 11kw, 400v MIG welder
c. 12kw, 400v three phase machine
d. 5kw, 400v three phase machine

thanks you in advance for your help

 

[Richard Burns]

so ive came to the conclusion that for a a 2.5mm would be suitable! ive now worked out vd which is 3.51v but not sure how to work out if its within the limits

cheque book and pen shall be yours..... (tag line from blankety blank (you were right)

Your supply voltage is 230V your volatge drop is 3.15V
3.15/230*100=1.36% is this less than the minimum %age drop?

 

[Rockingit]

i dont get what you mean!

Now you're making me feel very old!!!

This might help: Blankety Blank - Wikipedia, the free encyclopedia

 

[paulthemagpie]

Your supply voltage is 230V your volatge drop is 3.15V
3.15/230*100=1.36% is this less than the minimum %age drop?

thanks thats great! but were did you get that calc from as i dont have anything in my book to work that out! just the calc to work out the actual VD

 

[paulthemagpie]

Now you're making me feel very old!!!

This might help: Blankety Blank - Wikipedia, the free encyclopedia

lol!!!!! i understand what blankety blank is. haha.

i meant the cheaque book and pen bit?

 

[DPG]

If you won on blankety-blank you won a silver chequebook and pen trophy thing. Daz

 

[paulthemagpie]

If you won on blankety-blank you won a silver chequebook and pen trophy thing. Daz

oh! lol

 

[paulthemagpie]

Your supply voltage is 230V your volatge drop is 3.15V
3.15/230*100=1.36% is this less than the minimum %age drop?

oh i think i understand now! its the % of the vd in relation to the supply!

god, i wish my book would explain these things!

 

[paulthemagpie]

so in this situation were we above the limit does this mean we have to select the next size cable up!

also just for the others above. were they a 400v supply needed does this mean they can only be supplied via 3 phase

 

[Knobhead]

Paul, how many more questions to this paper? Just to let people know.

 

[paulthemagpie]

Paul, how many more questions to this paper? Just to let people know.

hi,

the pages and pages of more questions. i know quite alot of it. but when i get helped like on this thread its fantastic as i now know all about the csa and working out cable sizes with ref to ccc and VD so cant thank you guys enough!

Am i okay with posting more question if i get stuck? they is bound to be a few more!

thanks

 

[Guitarist]

How many years does this "course" run for btw? :leaving:

 

[Amp David]

Roughly 0.10 years!

 

[needasparks]

How many years does this "course" run for btw? :leaving:

That made tea come out my nose, cheers.