communal lighting , contactor

[glasgospark]

got a 240v ac set up for communal lighting in a small block of flats ,

call out was that outside lights not working , the contactor has 25mm incomer from db1 and 25mm outgoing to db2

incoming side also has 1.5mm t&e.


i cant seem to find the operating device for the contactor any suggestions ??

dusk-dawn pir ?

 

[glasgospark]

ok guys LOUD and CLEAR
























p.s

THANKS

 

[trev]

Nee bother tuppence

 

[glasgospark]

the25mm perm feed and neutral are in the top front terminals of the contactor , then theres the 1.5mm cables at the back of the contactor l-n ,then the load at the bottom ,

the 1.5 is obviously the L-N for the photocell but how does the photocell then make the switch to pull in the contactor

 

[Marvo]

The photocell is usually just a single pole switch, permanent live in and switched live out to A1 or A2 on the contactor.

25mm is a helluva large supply for '1 2d 28w fitting', are you sure that's all that's being supplied?

 

[micknew]

Should be in the DIY section.

 

[glasgospark]

The photocell is usually just a single pole switch, permanent live in and switched live out to A1 or A2 on the contactor.

25mm is a helluva large supply for '1 2d 28w fitting', are you sure that's all that's being supplied?

the incomers are huge i know , its feeding the 2d and 8 70w son lamps

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the incomers are huge i know , its feeding the 2d and 8 70w son lamps

wouldnt the photocell require neutral to operate ??

 

[HandySparks]

25mm is a helluva large supply for '1 2d 28w fitting', are you sure that's all that's being supplied?

Must admit, that was puzzling me too.

 

[glasgospark]

i cant see why 25mm DI tails were used for the load 2.5 would have been sufice

 

[Marvo]

the incomers are huge i know , its feeding the 2d and 8 70w son lamps

You mentioned the one 2D fitting weighing in at an impressive 28 watts but you failed to mention the Sodium lights with the high start currents.........

 

[glasgospark]

You mentioned the one 2D fitting weighing in at an impressive 28 watts but you failed to mention the Sodium lights with the high start currents.........

lol appoligies i meant to add a full load list dont know why its missed out

 

[micknew]

Start up currents do not need to be considered when calculating cable sizes.

 

[glasgospark]

Start up currents do not need to be considered when calculating cable sizes.

was this mentioned ?

 

[Marvo]

I'd be tempted to factor them in if the voltdrop became unacceptable/ < manufacturers spec during start-up.

 

[glasgospark]

can u clarify for me ,the 2 top rear connectors that go to photocell what happens from there

i thought the photocell would require l-n then bring a switched back to operate contactor no ?

 

[jay sean]

Does the contactor bring in a DB, hence the 25mm tails?