What are your thoughts on this 3ph domestic.

[charlie76]

The installation on the attached pic is a property with a 3-phase supply and a range of fuse boards. I am currently in training but this is a family friend and I have discussed carrying out a rewire for them once I get my papers. I intend notifying the works to BC and then getting NAPIT in to use it as an inspection site to get my competent persons sign of.

My query with this is, I was of the understanding with a 3ph supply, the consumer was obliged to balance their load amongst the 3 phases. This has recently had new fuses fitted by the DNO and as can be seen they have quite happily only connected one of the phases. If I carry out a rewire, should I design the system to utilise all three phases and leave 3 tails for connection by the DNO when complete or is this unnecessary in a domestic system due to the minimal load?

 

[GMES]

Please keep the thread civil or it will be closed.
@ Charlie if you have an issue with any comments aimed at you then feel free to use the report button that's why it's there, but to be fair you have said you are still in training which is why some members are cautious with their advice.
@sajeel by all means participate in the thread but leave the moderating to the moderators.

 

[sajeel]

I didn't ask if you went there, I asked if you actually carried out some sort of load study. Ie did you connect current recording equipment to the installation to record the actual load?

No because I wasn't being paid to carry out a test I was there with my plumber when he asked me if he could convert single phase to 3 phase.

 

[davesparks]

So you don't know any details of the overload, or even if it was actually an overload or another fault in the shower?

What was tripping on overload? You don't normally see a main circuit breaker on domestic

 

[sajeel]

As I said I spoke to potential customer who had a very large house with 2 showers 2 ovens and 2 hobs he was complaining of tripping on occasions when a lot of equipment is used simultaneously a quick walk around and rough calculation gave me the conclusion that even with diversity included if many appliances are used he will exceed the 100a rating of incoming supply head and that a further survey would need to be carried out and a upgrade to dno for 3 phase would be required if you are exceeding the 100a load

 

[7029 dave]

My first thought was single phase supply conversion, to three phase, but looking at that photo TNS lead supply no just replaced the 3 phase cut out. (me thinks, how do you know all phases are live)?

 

[DPG]

Certain people on here are consistently rude to newcomers. Maybe the guy is out of his depth, maybe he isn't, but no-one will come to this forum and stay if they are spoken to in this manner. I thought this had been stamped out a while ago. Daz

 

[davesparks]

As I said I spoke to potential customer who had a very large house with 2 showers 2 ovens and 2 hobs he was complaining of tripping on occasions when a lot of equipment is used simultaneously a quick walk around and rough calculation gave me the conclusion that even with diversity included if many appliances are used he will exceed the 100a rating of incoming supply head and that a further survey would need to be carried out and a upgrade to dno for 3 phase would be required if you are exceeding the 100a load

But what was tripping?

 

[Resu]

But what was tripping?

The last guy on the job by the looks of it!

 

[sajeel]

Resu your brain is tripping

 

[Resu]

Resu your brain is tripping

Not aimed at yourself bud. Aimed at the pic in the OP more than anything, can't understand how people let these installations get into such a state. You see it more and more often.

 

[overskilled]

I spoke with SSE power distribution regarding an install that was 2 SP meters off a 3 phase head (large house with guest house on the grounds (new owner was told by surveyor the electrics dated to the late 40s (looking at them I agreed VIR everywhere ). Tap tap tap 3 phases all live at that address. Speak to SSE about a 3 phase meter (seemingly broken into separate divisions ) SSE no charge to change to 3 phase meter and standing charge the same on a domestic install

 

[overskilled]

SSE reckoned going 3 phase might end up cheaper in that case as one standing charge and unit rate likely lower due to assumed higher demand (didn't quite figure that but must make sense to them )

 

[jjpsbristol]

[FONT=Calibri, sans-serif]He's been told by DNO it's 3ph. Anyone want to answer the OP?





[/FONT]

Accidental like. Can't unlike?

 

[GMES]

Accidental like. Can't unlike?

You have given him a thanks not a like, I guess he will be eternally grateful now