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Hi Guys installed new circuit for shower (7.8kW 230v/8.5kW 240v) in 6mm today. I also installed a mem alb321 rcbo. Test results were r1+r2 0.07, I/R 500+ Zs 39.68. RCBO test button works but fails to trip during test. I removed the load & tried RCD test again but no trip.  Installation is...

Hi Went to property today to do EICR that has x3 DB's, DB1 with x7 mcb's, 80a 100mA Earth leakage circuit breaker on a TT system with 6mm earthing conductor, 6mm water bonding. DB2 with x2 mcb's 100a 30mA RCD MS feeding shower & electric heater on TNCS system with 16mm earthing conductor...

Hi, customer suffering with nusiance rcd tripping since last september, TT system with 80a 30mA rcd main switch, 16mm tails & 9 circuits, (cooker 20a, ring 32a, ring2 32a, lights up 6a, lights down 6a, garage 32a, solar pv 16a, heating 16a, microwave 16a) 6mm main earth, 10mm bonding to gas...

Hi Customer has x5 12v down lights in kitchen, each with there own transformer. 1 of them stops for approx 10/15 minutes then comes back on. I have checked all connections for tightness & transformer to ensure not wrapped in insulation yet same issue. I then replaced the transformer...

Hi Got a customer having kitchen refurb, therefore minor work extending cooker, lights & socket circuit, But no rcd protection. Customer thinks there board is up to date & is not happy at extra work. I have given him the option of new board or having inline RCD protection for the...

Can you install Heat detector with battery back up from unswitched fused spur? This is for garage conversion into bedroom, all lighting circuits in property have no means of earth & customer does not want to have rewired or seperate cpc run. Building control insist on heat detector rather...

HI Is it acceptable for a commercial property to only have a 100mA rcd protection for a 3 phase system? (TNCS) customer wants extra sockets in food prep area of snooker club. cables run in suspended ceiling & then inside stud walls feeding about x6 2 gang sockets. They want some extra...

Hi guys Can u please give me some idea as to what you think is a fair price for a dual rcd board change? i appreciate it depends how many ways but I know sparks in my area charging at least

Hi A customer wants his white BT master phone socket replaced with a chrome (white inserts) master socket (supplied from Denmans). My problem is that on the BT master it has wires going to A & B, can you please advise where these wires go on the new master as there is no A & B. Thanks

Hi There is a small sub board in kitchen which feeds cooker, sockets & light in kitchen only. Customer has been advised to get 63a main switch changed to a 63a 30mA rcd main switch. Do I test for Zs & RCD trip times only on each circuit as i'm not interferring with existing circuits...

Hi guys I have a MEM 2000 AB32SB type B 32a mcb, can you please tell me if it is bs3871 or bs60898, as it doesn't say on the breaker. many thanks

Please help Prior to alteration of ring main i carried out end to end test, got 0.43 r1 0.43 rn but open circuit on r2. I then split the ring and carried out continuity of each leg, still left with open circuit on x4 sockets??? i then decided to reconnect the ring & split in a different...