AM2 lighting circuit - confusion

[Theapprenticesparky123]

I know this has probably been asked a dozen times on this forum but I just want to make sure that I'm doing this the correct way before going into my exam. I got told that in the am2 I need to have neutrals at every switch in connecters. I have never done it this at work hence the confusion. Here is a diagram I nicked from a post a few months back.

 

[STM]

Hi mate,

I wired my lighting circuit exactly like your diagram above. You're right, the neutrals need to be wired through the switches. Sometimes the layout/terminal identification on the intermediates can varying depending on the brands, so try not to let that throw you on the day.

Best of luck mate, you doing the Am2 or Am2s?

 

[Charlie_]

That must be due to the regs now asking for us to consider installing neutrals at light switches

 

[Octopus]

That must be due to the regs now asking for us to consider installing neutrals at light switches

Not taking Neutrals to switches shouldn't mean a fail though ...

 

[Wilko]

From what I’ve been told, it’s either exactly as instructed or a resit and £more ...

 

[davesparks]

Not taking Neutrals to switches shouldn't mean a fail though ...

The point with the Am2 is that you are given a design and specification to work to, not following this correctly is a fail. So not taking the neutral to the switches as specified is a fail, the same as not complying with a specification in the real world means not getting paid and having to re-do the work correctly.

If part of the exam was to design the circuit then what you say would be correct.

 

[James]

with new smart switches etc. likely to become more commonplace, it would be a good thing going forward to install N at all switch locations when wiring new circuits.

 

[telectrix]

for the past 6 months i've been installing 3core/E betweel switch anf light. whichever way you loop ( either 3 plate or loop at switch) all bases covered, even if the 3rd core is redundant at the time.

 

[Theapprenticesparky123]

Hi mate,

I wired my lighting circuit exactly like your diagram above. You're right, the neutrals need to be wired through the switches. Sometimes the layout/terminal identification on the intermediates can varying depending on the brands, so try not to let that throw you on the day.

Best of luck mate, you doing the Am2 or Am2s?

I’m sitting the AM2 mate

 

[Theapprenticesparky123]

Thanks for the responses everybody

 

[STM]

I see, fairshout.

Good luck mate, let us know how you get on

 

[gazdkw82]

Decent diagram. Would be good to see it actually wired in using the correct cables on a small set up.

 

[DPG]

Decent diagram. Would be good to see it actually wired in using the correct cables on a small set up.

Knock it up on a board - wouldn't take long.

 

[Joe147]

Hi all, I have my am2 soon and am just wanting to confirm what you do when testing the ring circuit for continuity and insulation resistance on the ring circuit if there is a switch fused spur Present. The part of the circuit on the outgoing side of the spur will that be tested if the spurs on or do I need to test that part of the cable individually? Also on a three phase install the pfc needs to be doubled to allow for a fault across two of the phases, is this correct? Any help would be much appreciated

 

[StephenRowley]

@Joe147

 

[Joe147]

@Joe147

Cheers appreciate that

 

[STM]

Hi Joe,

When testing insulation resistance, on mine I just turned the spur on. Similar to how you would leave a light switch on mate.

For PFC, you need to do two tests which are (PEFC) & (PSCC). Your tester may not be capable of measuring between phases (400v), if this is the case do as you said and double it.

Good luck mate.

 

[Joe147]

Hi Joe,

When testing insulation resistance, on mine I just turned the spur on. Similar to how you would leave a light switch on mate.

For PFC, you need to do two tests which are (PEFC) & (PSCC). Your tester may not be capable of measuring between phases (400v), if this is the case do as you said and double it.

Good luck mate.

Thanks mate big help

 

[ShaunG]

Not taking Neutrals to switches shouldn't mean a fail though ...

im getting close to my AM2 and have been told its not about wether you should its about following the specks that you have been given so if they ask for neutrals at the switches that what you do