installing a temp generator

[chris day]

I have a small bungalow sized building which I essentially a hut.
They lost power and the DNO may not rectify for a while.
The building will need a temp generator and only needs 3kw of power, asides from checking up on the regs can anyone offer some advice through their own experience?

 

[Devonchris]

I'm sure your aware, but just in case, make sure you isolate the bungalow from the dno supply as someone fixing a fault down the line may not appreciate a sudden return of power from an unexpected source.

 

[chris day]

Yes thanks for this, I will disconnect the tails entering in.

 

[Wilko]

Hi - What was the site earthing system and how was the shed earthed? Any bonding?

 

[Spoon]

Just out of curiosity, as I don't know a lot about generators: Correct me if I'm wrong but generators run more efficiently at the top end of their rating, about 80% and above?
So how would you size a generator for a house when the power consumption is a lot different during the day than night? Yes you would have to size it for the max power used....
In the OP's case, they are using a 3kW gen. At night time the small bungalow may only be using about 300W (TV, TV box and lights). Except for when they are making a brew or course.... So isn't the gen running way under efficiency?

 

[Deleted member 105166]

For a small but sensitive load, as in the example of electronic equipment above, one of those little Honda inverter gennies would be just the job. The are remarkably quiet too. Honda EU20i - P & I Critical Power Specialists - http://www.pandigroup.co.uk/online-shop/honda-portable-generators/honda-eu20i/

 

[loplug]

I had to do a changeover in a hospital we had a big genset for most of it but used the Honda inverter ones in some areas and agree they are a good set and quiet just the job for what you need I should imagine. What else you need to do will depend on the existing install

 

[snowhead]

The hut owner should be speaking to the DNO.
If the power is going to be off long enough for them to justify a generator then the DNO should be providing it.

If it's a multiuser problem they normally put a local generator(s) on the consumer side of the fault until the issue is sorted.

 

[chris day]

What was the site earthing system and how was the shed earthed? Any bonding?[/QUOTE]

So currently there is a TNS supply which has been isolated.
The mains bonds are connected to the MET for water.
No gas in building