- Reaction score
- 2,046
Hi guys, after some advice for a job currently ongoing. I'm fairly inexperienced when it comes to generators, trying to decide whether or not to take this on.
We are currently wiring a domestic new build (mostly!) property (including 4 separate buildings, all with lightings/small power). 90% done on 1st fix and customer has decided she wants a standby generator on the main dwelling (house out in the sticks and gets it fair share of blackouts). Initially I said maybe she could employ someone 'specialist' to supply/fit. She wasn't keen on this as there has been more than one 'specialist' involved in the build and most have turned out to be carp! Said she would rather we do it, as we're known to her and trusted. In the process of deciding whether to fit myself/sub out.
Shouldn't be a huge problem to install. Plant room (intake here and feeds SP house CU via 63A MCB in TPN board) is adjacent to proposed siting of generator. Earthing system is TNCS recently installed. I'm unsure on a few points.
1. Presumably I will need RCD protection for the sub main from plant room to house - when being fed by generator? (something like 100mA time delayed for discrimination?)
2. Do I also need overload protection to prevent the generator being overloaded? (Wholesaler has suggested SDMO 6000E - 6.5KVA along with ATS)
3. Looking at the wiring diagram provided for the generator, it does appear that N and PE are already linked - is this normal? Presumably this can be checked when the generator is run up anyway and if not they can be linked to provide a reference to earth.
4. Once an earth spike has been fitted and connected to generator, should this also be bonded back to MET?
Thanks in advance
[h=1][/h]
We are currently wiring a domestic new build (mostly!) property (including 4 separate buildings, all with lightings/small power). 90% done on 1st fix and customer has decided she wants a standby generator on the main dwelling (house out in the sticks and gets it fair share of blackouts). Initially I said maybe she could employ someone 'specialist' to supply/fit. She wasn't keen on this as there has been more than one 'specialist' involved in the build and most have turned out to be carp! Said she would rather we do it, as we're known to her and trusted. In the process of deciding whether to fit myself/sub out.
Shouldn't be a huge problem to install. Plant room (intake here and feeds SP house CU via 63A MCB in TPN board) is adjacent to proposed siting of generator. Earthing system is TNCS recently installed. I'm unsure on a few points.
1. Presumably I will need RCD protection for the sub main from plant room to house - when being fed by generator? (something like 100mA time delayed for discrimination?)
2. Do I also need overload protection to prevent the generator being overloaded? (Wholesaler has suggested SDMO 6000E - 6.5KVA along with ATS)
3. Looking at the wiring diagram provided for the generator, it does appear that N and PE are already linked - is this normal? Presumably this can be checked when the generator is run up anyway and if not they can be linked to provide a reference to earth.
4. Once an earth spike has been fitted and connected to generator, should this also be bonded back to MET?
Thanks in advance
[h=1][/h]