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    70KVA Generator Keeps Tripping Out

    Generator was replaced. Apparently the Triple MCB was fused at 20KVA and had been added as a customer requirement. I assumed that it was 70KVA as was written on the Generator Spec. :roll:
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    70KVA Generator Keeps Tripping Out

    Imbalance is a possibility. However, I had the board professionally built. All of the heating is evenly balanced across the three phases as are the lights. The only point of possible imbalance is on the power. It is spread across two phases. I woud ask how balanced does it need to be...
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    70KVA Generator Keeps Tripping Out

    That's the thing! The trip on the genny is a 3 phase MCB, which can only blow if its load capacity is exceeded 70KVA + The house without heating would hit no more than 15KVA. The genny is experiencing some sort of surge in my opinion. However the genny engineer is asking us to investigate a...
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    70KVA Generator Keeps Tripping Out

    don't think so, but I did run the heating on full (30KW) for hours on a different genny one month ago. No probs.
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    70KVA Generator Keeps Tripping Out

    should I expect problems when the main supply is connected? Logic tells me no!
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    70KVA Generator Keeps Tripping Out

    Engine is fine and doesn't shut down. The generator within was tested by an engineer from the hire company as delivering correct voltage and capable of delivering 70KVA. The house or load in this situation has an underfloor heating system that draws 30KW of power across the three phases...
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    70KVA Generator Keeps Tripping Out

    Main supply will take a week to install - customer has moved in.
  8. C

    70KVA Generator Keeps Tripping Out

    Neutral and earth are coming from the generator
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    70KVA Generator Keeps Tripping Out

    I am supplying a 3 phase board with from a 70kva 3 phase generator. The board is protected by a 100A screw in fuse on each phase. The generator unfortunately keeps tripping out without MCBs, RCDs tripping in the board or any of the 100A fuses blowing. The house has passed all earth and...
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    Colour Coding for 3 Phase in Ireland

    I am feeding a 3 phase DB. Is the colour coding still Red Yellow Blue for the phases and Black for the Neutral? If the cables are safely enclosed from cabinet to board, can I use PVC Single core cables?
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    Single Phase v 3 Phase

    No upstairs heating by the way. Spoke to the Electricity supply engineer. With a standard three phase supply, I can only be given 80A per phase. This would leave me short. The solution will probably involve a current transformer with up to 300A output. I am not sure if the transformer is...
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    Single Phase v 3 Phase

    Will keep you posted. Will talk to Suply Authority tomorrow or Tuesday - should have a solution by then.
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    Single Phase v 3 Phase

    Diversity can only be applied to the power and light in this situation. The heating is designed with 5 zones each having 3 elements. There is an under floor probe for each zone feeding back to a controller. The whole system will run during the night on low tariff . Since I haven't run...
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    Single Phase v 3 Phase

    The house is built on a remote site. The supply authority have erected a pole, mounted a transformer and given him his 16 KVA supply. You are right the design is not sensible at all. It is built with 12 inch blocks with a foot of stone added on. Without any power in the house, it is already...
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    Single Phase v 3 Phase

    4000 SQ Foot House - Underfloor Heating with 17 elements each drawing 10A - 120 Spots - 3 Ring mains etc. The customer ordered a 16 KVA supply for 2000 Euro thinking it could run a factory! I need to come up with a solution. The expected load would be 70A for power and light and 170A for...
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    Single Phase v 3 Phase

    Generally speaking, what is the KVA limit for a single phase supply?? Can you have, for example, a 30 KVA single phase supply?? :?:
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    Main Bonding to Hot Tank Cupboard

    Is the 10mm back to board OTT or the cross bonding between heating pipes over doing it. I have observed 10mm cross bonding in heating cupboards on several occasions and followed a logic that the return to board would be of the same dimensions
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    Main Bonding to Hot Tank Cupboard

    I have run a 10mm earth cable cable from board to hot hot tank cupboard and have looped across all pipework with 10mm loops. This is correct isn't it???
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    Bonding a House with Four Bathrooms

    I am wiring a house with two ensuites and two big bathrooms. Should I take my earth off the light in each bathroom and have four bonding loops or loop off one light and loop across the four bathrooms and have one bonded circuit?
  20. C

    10.8 KW Electric Shower - 6mm or 10mm

    that's the thing - I ran in a 6mm already. The cable is run through an attic and could be changed in an hour and a half. It's not a big job and I'll probably re-do it. The 64 million dollar question is would an electrical inspector have grounds to fail this part of the installation citing...
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