3 phase volt drop.

[mansabadman]

Howdy, when designing a 250A 3 phase supply, what column value do you use for volt drop??
Table 4d4b, section 4(3/4 core 3 phase ac) column r,x or z.
I'm thinking r, but not 100% sure. Cheers in advance!!!

 

[Plonker 3]

Depends upon load type

R= resistive load
x= inductive reactance
z= impedance

 

[mansabadman]

It's for the 2396 project.
The supply is for a commercial property so it will be resistive load I presume?

 

[Pete999]

Could be any sort of load, a bit of all sorts

 

[Plonker 3]

What is it feeding?

 

[mansabadman]

The building is just bog standard loads. Lighting General socket power, about 1/3 is on 2xlifts and hvac system. Mixed bag.

 

[Plonker 3]

Page 59 of the Electrical Installation Design Guide has a bit more information for you in regards to this.