Discuss compressor run from socket!? in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net

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sheepysheephead

Basically, a matenof mine has an air compressor in his garage (hes a sprayper/panel-beater). Well the compressor is 3 phase compressor but is converted to single phase, with a 13a plug running the initial motor and then a second 13a plug supplying the second running motor. Initially, the compressor has been run from a double socket supplied on a 16a radial from an old rewireable fuseboard. The guy who rewired the socket up absolutely minced it.

My question is, can i run the compressor beings its converted to single phase off a socket on a 16a radial? Or should i use a 32a radial run with 4mm?

Havent fitted a compressor like this before so a bit stumped!
 
Well with all the wisdom in the world i'd struggle to give accurate answers unless you give relative power rating of compressor etc...
 
Well with all the wisdom in the world i'd struggle to give accurate answers unless you give relative power rating of compressor etc...

Sorry there's 2 x 5hp motors, working out to be 3.7Kw per motor, one acts as kind of a pony motor, starting up first with a 30 second delay on the 3ph to single phase converter kicking in the 2nd motor. Am i right in thinking that the total power rating would be 7.4Kw? Been a while since i did my HNC!? And havent really worked with motors since 2009!
 
Sorry there's 2 x 5hp motors, working out to be 3.7Kw per motor, one acts as kind of a pony motor, starting up first with a 30 second delay on the 3ph to single phase converter kicking in the 2nd motor. Am i right in thinking that the total power rating would be 7.4Kw? Been a while since i did my HNC!? And havent really worked with motors since 2009!

Sorry been so headstrung today,

So basically is the total power of the compressor is 2 x 5hp, multiply by 0.74 for Kw....

3.7kW per motor, which gives a total power of 7.4Kw.

P = VI

P = 240 x 32A

P = 7680w or 7.68Kw
 
Basically, a matenof mine has an air compressor in his garage (hes a sprayper/panel-beater). Well the compressor is 3 phase compressor but is converted to single phase, with a 13a plug running the initial motor and then a second 13a plug supplying the second running motor. Initially, the compressor has been run from a double socket supplied on a 16a radial from an old rewireable fuseboard. The guy who rewired the socket up absolutely minced it.

My question is, can i run the compressor beings its converted to single phase off a socket on a 16a radial? Or should i use a 32a radial run with 4mm?

Havent fitted a compressor like this before so a bit stumped!

Walk away would be my first option, but you also need to explain how they modified a 3 phase motor to single phase and have you confirmed the load drawn with a meter?
 
Walk away would be my first option, but you also need to explain how they modified a 3 phase motor to single phase and have you confirmed the load drawn with a meter?

lol , long time no see , hope your well ;-)
 

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