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They didn't which is why they haven't.

And what about an existing installation for which no records are available - 99.9% of domestic installations? Even your design figures don't really care what the Voltage is at the origin, only that the voltage drop from that point to the applicable point is no more than 3% or 5%.

:roll: :roll: :roll: :roll: :roll: :roll: :roll: :roll: :roll: Ask a proper question instead of asking one which is pointless, meaningless and gibberish. So, rant on, rave on, do what you like BAS. I know you won't ask a real question so we'll either go around in circles for eternity...

So what you are saying is that if the actual voltage at the origin of the installation is 216.2V (within tolerance of Uo) because you're at the last pole, you are not permitted any voltage drop at all as 3% of 230V is 6.9V which gives a maximum lower threshold of 223.1V? Or that if the voltage...

The shower is a multi-head system similar to those used in Eastern-Bloc industrial wash houses and are fed from a single large bore pipe from a communal water heating plant -again similar to an Eastern Bloc communal system. The installation does not comply with any British Building Regulations...

Why not take it further and factor in the permitted tolerance of the nominal voltage?

:roll: :roll: :roll: :roll: :roll: :roll: :roll: :roll: :roll: :roll: :roll: :roll: :roll: :roll: :roll: :roll: :roll: :roll: :roll: :roll: :roll: :roll: :roll: :roll: :roll: :roll: :roll: :roll: :roll: :roll: :roll: :roll: :roll: :roll: :roll: :roll: :roll...

:roll: I think we should agree to disagree :roll:

:roll: I think we should agree to disagree.

BAS, your recent reply to such a question was that the electrician should simply note all the things he can't inspect and test as departures. What's changed?

You're right, I missed the point that as yet the cable is not connected to an OPD. :D

I suspect they might see through the verbose sham that you have persisted in peddling for donkey's. BAS, I really can't help you if you refuse to be helped. It probably is irrelevant in BAS7671. I don't know, as I don't have and don't want a copy. Your question is gibberish. You might as...

:roll: :roll: :roll: Awww..bless...

I'm sorry you sat up all night Googling to come up with such clap trap. I'm sure BAS could give you some training on Googling and cutting & pasting... :lol: :lol: :lol:

I know Softie, which is why you should join BAS in his bedroom. I'm sure the the two of you together in matching jim-jams would be very happy together :lol: :lol: :lol: :lol: :lol: :lol: :lol: :lol: :lol: :lol: :lol: :lol:

I can see they you are determined. I'm sure the size of bath or shower tray is irrelevant in BAS7671, but it isn't in BS7671. I'm sure voltage drop over 200' for a socket circuit with BS1363 accessories is irrelevant in BAS7671 but it isn't in BS7671. I'm sure the plans for your...

For any in-service installation, Voltage Drop can only be verified at best as a rough rule of thumb, whether by measurement or calculation based on measured values. I wonder how many are now installing Standard Circuits in accordance with the new specifications found in the new OSG?

I think even the NIC won't be going that far. Then again, maybe they've produced something in their (sorry the ESC) Technical Manual.

525.1 also states that you must have the product standard relevant to the equipment. That's before you even get to thinking about normal service conditions. By the way, hands up those who think Zs tests are 'very' accurate? Testing in general is not a fine science. Tolerance of test equipment...

Surely you're not suggesting that accurate diagrams are not available?