Hi
Pls can you help with the following emergency lighting query
The set up consists of a key switch, a neon and a 1 way switch
t&e mains ran to the supply side of the key switch and a 3 core ran to provide the Emergency Live on the load side , the N and a switched live for the 1 way switch
Links to Neon L&N taken from the load side of the key so that when the key is operated the Neon goes out (simulates a mains fail)
link from L on the supply side of the key taken to Common on the switch ( so that the lights stay on and only the emergencies go off )
thats my understanding , however 2 little things that bug me which I know will be very simple once explained...
1. the link from the supply side of the key to Common on the switch - what is the purpose of this link ? Im thinking its so when you switch of the lights from the 1 way switch it also switches of the emergency is this right ? however im thinking it wouldnt switch them as the link is taken to the supply side hence leaving the bottom side ( load untouched) this is where im getting confused about the purpose of the link , I thought of it being to provide a permanent live however the supply side of the key is fed from the mains...
any help would be greatly appreciated
thanks
Pls can you help with the following emergency lighting query
The set up consists of a key switch, a neon and a 1 way switch
t&e mains ran to the supply side of the key switch and a 3 core ran to provide the Emergency Live on the load side , the N and a switched live for the 1 way switch
Links to Neon L&N taken from the load side of the key so that when the key is operated the Neon goes out (simulates a mains fail)
link from L on the supply side of the key taken to Common on the switch ( so that the lights stay on and only the emergencies go off )
thats my understanding , however 2 little things that bug me which I know will be very simple once explained...
1. the link from the supply side of the key to Common on the switch - what is the purpose of this link ? Im thinking its so when you switch of the lights from the 1 way switch it also switches of the emergency is this right ? however im thinking it wouldnt switch them as the link is taken to the supply side hence leaving the bottom side ( load untouched) this is where im getting confused about the purpose of the link , I thought of it being to provide a permanent live however the supply side of the key is fed from the mains...
any help would be greatly appreciated
thanks