Help with new venue electrics

A friend of mine is working in a venue that has just had new electrics installed and they’ve put a 30ma trip over the main stage power outlets. The electrics company (with no experience of event power) are insisting that this is the only way to do this and are refusing to change this. I don’t install hard power so I don’t know the regs but I would assume that with a well written method statement and RA, a variable was perfectly acceptable as long as there were 30ma RCDs downstream. I’ve been asked to help them out and find evidence that this is possible and legal to give to the install company.

Sorry I'm not a qualified sparky but I fail to see the problem here?
AFAIK an RCBO has to protect every individual circuit on a distribution board now. That is the regs.
Every modern distribution board i've worked with has been wired this way.
I don't think i'd want to work with one that isn't, is there some specific item you're trying to power up that has a problem with this set up?
Or does someone using the stage power just like to live dangerously?
Maybe i've mis-understood what you're asking here?

Sorry, I’m in the uk, so let’s say someone comes and plugs in a safe but pretty leaky video wall into the 63/3 that has a 30ma RCD over the circuit. The wall is powered up and trips the 30ma. The way I’m used to it is that all venues I’ve ever worked in will have a main power supply socket, anything from 32/3 to 125/3 with only an MCB over it. I then plug in my distro that I’ve turned up with for my show that has rcbo’s across every 16a out or a 30ma RCD over maybe every hot socapex out or heavier three phase. Some distros I use even have a variable across some outs to accommodate things like lots of leaky LEDs.

Edited by monkeypuzzle - 26 September 2022 at 4:42pm

Sorted. 18th edition specs up to and including 32/3 must have 30ma. Dull… but safe

It’s the term “final circuit” that some installers take as any socket on the wall… There are plenty of venues with 30ma trips on 125/3 and 63/3 outlets that are unusable for video (or now large scale led lighting rigs) We often have to educate the venue staff as to why their install is unsuitable for our use. For example Brixton academy has a perfectly located 63/3 that would be great for video dept to use but it’s on a 30ma trip…