ATS for lighting circuit

[CntrlAltDel]

Hi there,

I'm intending to wire up a automatic transfer switch to switch between main and backup power just for the 2 lighting circuits. Both of them seem to be connected to a "hot" neutral link bar (not protected by earth leakage). I assume it was done this way because none of the lights have any fans that require isolators.

My question is, since the neutrals for the lighting circuits are connected to the hot neutral link bar, could I wire them to the the second DB board (with the ATS) in a neutral link bar that goes directly to the ATS instead of placing a breaker on the neutrals (which is how it was wired in the main DB board)?

Most of the documentation for the ATS devices seem to include breakers for both the phase and neutral. Just thought this might be an instance where that is not necessary however I wouldn't mind doing it either.

 

[leon.davibe]

Hi there,

I'm intending to wire up a automatic transfer switch to switch between main and backup power just for the 2 lighting circuits. Both of them seem to be connected to a "hot" neutral link bar (not protected by earth leakage). I assume it was done this way because none of the lights have any fans that require isolators.

My question is, since the neutrals for the lighting circuits are connected to the hot neutral link bar, could I wire them to the the second DB board (with the ATS) in a neutral link bar that goes directly to the ATS instead of placing a breaker on the neutrals (which is how it was wired in the main DB board)?

Most of the documentation for the ATS devices seem to include breakers for both the phase and neutral. Just thought this might be an instance where that is not necessary however I wouldn't mind doing it either.

Yea both live and neutral has to be switched over so you have to have a neutral that is linked to the inverter neutral

So your lights has to be connected to the ats

And it has one leg go to eskom neutral/live

And the other leg to inverter live/neutral

If it has to be on a breaker i don't know

As far as i have it two circuits doesn't "have" to be on earth leakage. Lights and stove

Lights i understand
Nobody is likely to be able to touch lights in day to day use
And if leakage trips you have lights

stove not so much

 

[CntrlAltDel]

Yea both live and neutral has to be switched over so you have to have a neutral that is linked to the inverter neutral

So your lights has to be connected to the ats

And it has one leg go to eskom neutral/live

And the other leg to inverter live/neutral

This is already handled by the ATS so I dont think combining the neutrals are necessary. The question is more around if I bring in the neutral from the lighting circuit, connect it to a neutral link bar and connect a neutral from there to ATS load neutral mimicing the main DB board setup would this be an issue since the documentation all show a breaker for both neutral and phase and this setup would only have a breaker on the phase on the lighting circuit and the phase of the grid coming feeding the ATS.

So in other words:
Lighting circuit live = live -> 10a breaker -> into ATS
Lighting circuit neutral = neutral -> neutral link bar -> ATS (no breaker)
Grid Phase power = Phase -> breaker -> into ATS
Grid Neutral power = Hot neutral -> neutral link bar -> into ATS (no breaker)

 

[leon.davibe]

This is already handled by the ATS so I dont think combining the neutrals are necessary. The question is more around if I bring in the neutral from the lighting circuit, connect it to a neutral link bar and connect a neutral from there to ATS load neutral mimicing the main DB board setup would this be an issue since the documentation all show a breaker for both neutral and phase and this setup would only have a breaker on the phase on the lighting circuit and the phase of the grid coming feeding the ATS.

So in other words:
Lighting circuit live = live -> 10a breaker -> into ATS
Lighting circuit neutral = neutral -> neutral link bar -> ATS (no breaker)
Grid Phase power = Phase -> breaker -> into ATS
Grid Neutral power = Hot neutral -> neutral link bar -> into ATS (no breaker)

Yea i don't think it has to have a breaker , because inverter has protections

But not sure on regulations
The way the earth leakage breaks both L+N would suggest

There may be regulation that state it has to, but if inverter does this 6/half dozen

 

[CntrlAltDel]

Yea i don't think it has to have a breaker , because inverter has protections

But not sure on regulations
The way the earth leakage breaks both L+N would suggest

There may be regulation that state it has to, but if inverter does this 6/half dozen

In this case the lighting circuit as is not part of the earth leakage protection. And the neutral has no breaker for the lighting circuit.

 

[leon.davibe]

In this case the lighting circuit as is not part of the earth leakage protection. And the neutral has no breaker for the lighting circuit.

Yea did not think of that

So no breaker