What tests need carried out and in what sequence? I assume that when you say energised you mean turn the power on to the new circuit / cables?
There are two two test stages and should be done in the correct order
Dead Tests;
Continuity of protective conductor
Continuity of ring final circuit conductors
Insulation resistance
Protection by selv,pelv or electrical separation
Protection by barriers or enclosures
Insulation of non-conductive floors
Dead polarity of Circuit
Live Test;
Live polarity
Earth electrode resistance(Ze)
Earth faulty loop(Ze,Zs)
Prospective fault current
Functional Test of RCD and circuits.
These test test should be done using a certificated calibrated test meter/meters.
Nice man from the coucil told me to chase walls to acheive min 50 mm cover. Second nice man from council now tells me to check with structural engineer as this may now weaken the integrity of the wall. Surface mounted conduit now suggested.
When chasing walls you can only chase a maximum depth of one third of the walls leaf thickness for vertical chases.
and one sixth on the horizontal.
Chase should not impair the structural stability of the wall.
The 50mm depth that you spoke of is concerning the use of RCD protection in some chase this can not be achieved due the above regulation on chase depths, so mechanical protection will need to be used either interrogated with cable or metallic caps/conduit.
All things your electrician should be fully aware of, if you are interseted in the test procedurers I recommend the purchase of Guidance Note 3 by Thr IEE and Practical Guide to Inspection, Testing and Certification of Electrical Installations by Chris Kitcher.
I can give you ISBN numbers if you wish!