Electrical Cabling Size Table

[Marky]

17th edition

Oops sorry I missed your reply! I'll have a read of it tomorrow at the office! Thanks a lot

 

[malfunkshun]

Guys I'm not looking for the calculation - it really doesn't need to be as complicated as you're making it sound Our engineers rarely fit cable - but when they do they are told the phase (single or three) of the supply and the wattage the equipment will require. From that they need to know what size cable they require for the job. The length of cable they use is usually two meters max.

Honestly, they know the voltage, they are told the power demands, an engineer absolutely should know what standard cable to use.

 

[bitslice]

Honestly, they know the voltage, they are told the power demands, an engineer absolutely should know what standard cable to use.

Let's hope there are no environmental factors to consider, or they may just have to ask an Electrician what to do again

*snigger*

 

[Abraxaz1]

Something like this?



orginal page
links

 

[cheechm]

Rough guide:

13A or 15A TRS - 1.5mm2
16A 1P+N+E TRS - 1.5mm2 or 2.5mm2
32A 1P+N+E TRS - 6.0mm2
63A 1P+N+E TRS - 10.0mm2 or 16.0mm2
125A 1P+N+E TRS - 35.0mm2

16A 3P+N(+E) TRS - 1.5mm2 or 2.5mm2
32A 3P+N(+E) TRS - 6.0mm2
63A 3P+N(+E) TRS - 16.0mm2
125A 3P+N(+E) TRS - 35.0mm2

 

[malfunkshun]

Let's hope there are no environmental factors to consider, or they may just have to ask an Electrician what to do again

*snigger*

It would be useful if we knew exactly what cable, or at least cable for what?.....the range is mind-boggling.

 

[Kenai]

Honestly, they know the voltage, they are told the power demands, an engineer absolutely should know what standard cable to use.

It sounds increasingly like these guys are engineers in job title only and are actually more akin to mechanical fitters or something

 

[big_white_dog84]

95mm^2 Al does 200A or 150kVA at LV, 4MVA at 11kV
185mm^2 Al does 300A or 220kVA at LV, 6MVA at 11kV
300mm^2 Al does 400A or 300kVA at LV, 8MVA at 11kV

That's all I need to know.

 

[daz87uk]

resistivity of whatever material of the conductor doesn't do anything for the OP cable sizing

so ur telling me op can have infinite length cable because resitivity wont effect voltage? because I was under the impression that you need to increase CSA To combat the increased resistance over length? not that it matters as he now said its only 2metres long!

 

[lemonkettaz]

But you need to know the CSA already to find the resistivity?

In terms of cable sizing you don't need that formula... thats all I know, I'm not a guru

All other factors are needed as well as Length, but does it pass through an insulation, what is the ambient temperature the cable sit in, how is it installed in the building or whatever?

is it single or 3 phase...

 

[feriso]

It sounds increasingly like these guys are engineers in job title only and are actually more akin to mechanical fitters or something

Probably the truth - I have the same issue with my maintenance/fitting team that they sometimes call themselves engineers - I CBA to correct them all the time as it'll do me no favours. Anyway lets not derail the OP request...