- Reaction score
- 116
Been to a job today to replace a faulty immersion thermostat. The existing spur supplying it was broken and about 30 years old so I replaced that and installed a DP water heater switch. Also the HR flex to the immersion was cracking through age / heat fatigue so replaced that.
Seems the supply to the existing spur is from the socket ring circuit, not a dedicated circuit. Also appears there is no EP bond on the main incoming water supply to the property. Both items I have notified the client and also written on my Mod cert under 'Comments on existing installation'.
So then I read reg 132.16 to see if I should have actually carried out the above works given the wording there. So the first point in that reg 'ascertain that the rating and condition of existent equipment [is adequate]'. Ok so the cable rating is, I have fused down to 13A at the spur the ring is protected by a B32 MCB, although the immersion soured off the ring arrangement is incorrect I believe it is adequately rated, am I correct in making this statement.
Second point in the regulation 'Earthing and bonding arrangements [etc etc etc]'. The protective measure I have applied to the modification is a 13A BS1363, the circuit Zs is 0.21ohm so all good there. The circuit is also protected for additional protection with a 30mA RCD, so although the main incoming water is not bonded and should be, does this impact on the modification I have carried out. Note, Supplementary bonding is provided in the location of the tank to all pipework of the installation and is also bonded to the main incoming water supply.
The client does intend on me bonding the water supply for them and also installing a separate feed to the immersion. But lets say they decided not to, how does this leave me even though noted on my cert?
Seems the supply to the existing spur is from the socket ring circuit, not a dedicated circuit. Also appears there is no EP bond on the main incoming water supply to the property. Both items I have notified the client and also written on my Mod cert under 'Comments on existing installation'.
So then I read reg 132.16 to see if I should have actually carried out the above works given the wording there. So the first point in that reg 'ascertain that the rating and condition of existent equipment [is adequate]'. Ok so the cable rating is, I have fused down to 13A at the spur the ring is protected by a B32 MCB, although the immersion soured off the ring arrangement is incorrect I believe it is adequately rated, am I correct in making this statement.
Second point in the regulation 'Earthing and bonding arrangements [etc etc etc]'. The protective measure I have applied to the modification is a 13A BS1363, the circuit Zs is 0.21ohm so all good there. The circuit is also protected for additional protection with a 30mA RCD, so although the main incoming water is not bonded and should be, does this impact on the modification I have carried out. Note, Supplementary bonding is provided in the location of the tank to all pipework of the installation and is also bonded to the main incoming water supply.
The client does intend on me bonding the water supply for them and also installing a separate feed to the immersion. But lets say they decided not to, how does this leave me even though noted on my cert?
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