It sounds like what your mate had was an RCD main switch and MCBs for each circuit.
My best guess without looking/testing is that your tools have a little earth leakage going on in an Installation which is already teetering on the edge of the limit of earth leakage the RCD will tolerate.
the...
If you go to this website and check out P 16 it should clear things up for you a little. (Please Register For Free or Login to See This Resource)
the rest of the brochure is worth a read too it outlines what will happen and what to expect.
I done my apprenticeship through SECTT and the SJIB all...
No problem, if I'm right in what I'm saying regarding the building regs and notification being required. it is a fairly simple process which the Electrician can complete along with certification at no extra cost or hassle to you as long as they are registered with the likes of NICEIC or NAPIT...
What are you planning on supplying the light from? A fused connection unit from a socket circuit or direct from a lighting circuit. And how so you plan to protect the cable from UV?
There are many considerations and where the cable will actually be run and what it passes through and under can...
An example of how to test Ze on a TT system. This is the same process regardless of Earthing arrangement, however much lower Ze readings are expected with other earthing systems.
An example on how to carry out PFC tests.
PSCC Prospective Short Circuit Current (line to neutral), (Line to Line in 3ph) ENSURE YOUR INSTRUMENT IS CAPABLE OF TESTING BETWEEN LINES.
PEFC Prospective Earth Fault Current (Line to Earth), (Line 1-Earth, Line 2-Earth, Line3 - Earth in 3ph)
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