AM2 Lighting

[ackbarthestar]

From what I can see, youngbart, both of your drawings are correct, that is, both will work.
The easiest one is to grasp is your top drawing and probably the one to remember

The top one is an adaption of a two plate wiring system and the bottom one is an adaption of of a three plate wiring system.

Now whether it is acceptable to use a 2-plate method in T&E or whether it acceptable to take a neutral down to the switch for a 2-plate method are open to debate.

However, if you are still in doubt I would draw out 16 little diagrams, tedious I know, but you'll have a handy reference for the future.

 

[somersetsparks]

I thought they used singles for the lighting on the AM2? how times change, T+e for everything now :-(

 

[ackbarthestar]

I thought they used singles for the lighting on the AM2? how times change, T+e for everything now :-(

If its conduit wiring then it should be by convention 2-plate wiring.
If i remember rightly, there is both T&E and singles used on the AM2. I can't remember whether or not they use T&E for the lighting though.

 

[Hants-Spark]

If its conduit wiring then it should be by convention 2-plate wiring.
If i remember rightly, there is both T&E and singles used on the AM2. I can't remember whether or not they use T&E for the lighting though.

It was singles when I done mine some 25yrs ago but they never told you how it was to be wired you could do it however you wanted, 2 or 3 plate.

 

[somersetsparks]

It was singles when I done mine some 25yrs ago but they never told you how it was to be wired you could do it however you wanted, 2 or 3 plate.

Same when I done mine 5 years ago, seem to remember it had a landlords override switch as well.

 

[Hants-Spark]

Same when I done mine 5 years ago, seem to remember it had a landlords override switch as well.

Possibly but I dont have that good a memory I'm afraid lol, I mainly remember having to wire a nurse call system as one of the modules, safe to say I was panicing but lucky enough I got it to work, more luck than judgement I think lol

 

[YoungBart]

It's all in twin now, got my results back and I failed the install, something on the ring circuit and something on the lighting, all tested and worked fine so not really sure what was wrong.

 

[Hants-Spark]

It's all in twin now, got my results back and I failed the install, something on the ring circuit and something on the lighting, all tested and worked fine so not really sure what was wrong.

Gutted for you mate, chin up though and I'm sure you'll pass the resit. Good Luck

 

[KAS1]

In practice how many conduit systems would you wire in singles as a 3 plate ???

It was singles when I done mine some 25yrs ago but they never told you how it was to be wired you could do it however you wanted, 2 or 3 plate.

 

[Outspoken]

The spec says I can assure you 150% the feed from the db to sw1 next to the db, a 3 core and earth from sw1 via the intermediate to sw 3, the twin and eaearth fom the light back to switch 1, hence you will have two twin and earths in the first switch, screwless connectors must be used to marshall the neutrals and cpc`s, the common in the intermediate and also the lone cpc in switch 3, eg wagos

That is bad practice unless there is absolutely no choice, neutrals should not be in switches.

Feed goes from MCB to Light, from light a T&E to Switch 1 (2 Way), from Switch 1 take a 3C & E to Switch 2 (Intermediate) and then another from this switch to Switch 3 (2 way). You just have to ensure you connect it correctly...

Job DONE

 

[Outspoken]

Have to agree with many of the comments here, if you are wiring lights in conduit, then 2 plate is the preferred method. With T&E or structured cable installs then the preferred method is more often 3 plate as you do not end up with neutrals and joints in switches.

 

[markc123]

It's all in twin now, got my results back and I failed the install, something on the ring circuit and something on the lighting, all tested and worked fine so not really sure what was wrong.

Unlucky buddy, you'll get there in the end - have a never say die attitude and turn up next time even more determined. Being from Bridlington, are you doing it in Hull by any chance? i did mine there years ago.

Your installation was probably correct, worked perfectly and tested out bob-on. However, if you haven't followed there instructions then you'll fail even if your way is better than theres. The AM2 test is also about being able to follow orders, which you'll have to do on site whether it's from the architect or your boss. Read the instructions very carefully. Best of luck.

 

[ackbarthestar]

It's all in twin now, got my results back and I failed the install, something on the ring circuit and something on the lighting, all tested and worked fine so not really sure what was wrong.

My sympathies, Youngbart, its a real barsteward when things go pear shaped when you thing all has went well.

I think its now standard practice to get some feedback about your efforts, so it would be well to ask why they failed you.

Its always good to have some redirection so you don't make the same mistakes again....

 

[Hants-Spark]

In practice how many conduit systems would you wire in singles as a 3 plate ???

In practice probably none, but just saying at the time they never stated the method which it was to be wired, therefore it was your choice.

 

[YoungBart]

Unlucky buddy, you'll get there in the end - have a never say die attitude and turn up next time even more determined. Being from Bridlington, are you doing it in Hull by any chance? i did mine there years ago.

Your installation was probably correct, worked perfectly and tested out bob-on. However, if you haven't followed there instructions then you'll fail even if your way is better than theres. The AM2 test is also about being able to follow orders, which you'll have to do on site whether it's from the architect or your boss. Read the instructions very carefully. Best of luck.

Yes doing mine Hull, given the state of some if the accessories I probably used the same gear as you did! I think I know what I've done wrong in the lighting, and it's just a case of I mis read the drawing and fed the furthest switch instead of the nearest one,

will definitely ring them to find out what I've ballsed up on my ring circuit though. Just noticed I have to re do my fault finding as well. I got a fault on the motor which stumped me, so I probably got that wrong.