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Hi all,

Can anyone assist please. We are currently renting 3 phase generators to provide a electrical supply to some A/C units, total running current per phase around 450-500 amps. As the generator comes bonded is their anyway I can ensure we have a sound earth when put on the ground. I have seen some generators with a Earth Spike..but some just on the ground. Due to ther running currents I want to be sure the earth is sound and the chiller will trip on a earth fault.?
Best regards

John
 

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The Earth does not mean CRAP, the Earth could care less that you have a generator.


You need your electrician make sure the system GROUNDED CONDUCtOR/NEUTRAL/XO is bonded to the grounding electrode conductor in the facility. So all metallic components in your facility are at the same potential of the generator GROUNDED CONDUCtOR/NEUTRAL/XO.

BUT you also need to comply with all UK codes and standards.
 

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The Earth does not mean CRAP, the Earth could care less that you have a generator.


You need your electrician make sure the system GROUNDED CONDUCtOR/NEUTRAL/XO is bonded to the grounding electrode conductor in the facility. So all metallic components in your facility are at the same potential of the generator GROUNDED CONDUCtOR/NEUTRAL/XO.

BUT you also need to comply with all UK codes and standards.


Not if the system is TT, which is allowed in BS7671. In that case earth is essential in clearing a fault on the chillers.
 

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Not if the system is TT, which is allowed in BS7671. In that case earth is essential in clearing a fault on the chillers.
A tt system is very rarely used and essentially does not use an egc. Since we are required to use an egc, that didn't really apply. Even when a tt system is used the consumer is responsible to supply the grounding electrode system to earth.
 

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