My paint/adobe skills are s**te and I have a very good 4th year apprentice that needs a wiring diagram for an unusual emergency lighting system.
In my days it would have been drawn on the back of a cig packet.
So if anyone is prepared to have a go let me know.
Give Qelectrotech a go:
I'd never used it before and I drew out a central heating wiring diagram in maybe 10 minutes.
Theo
I might be able to knock something up in Visio...
He's capable of knocking things up himself, but specifically is after a wiring diagram.
;)
Thanks. I have some free time to have a go. If I get stuck I'll email John for help.
Basically the circuit consists of a fluorescent 5ft light fed from an MCB on that floor in the mains room. There is a switched supply (switched in the the ops room on that floor) and a permanent 230V via a test keyswitch in the mains room.
However there is also a 1 foot florescent tube in the same fitting that acts as the emergency light - this is fed from a 110V supply from the middle floor mains room on the essentials DB. Now this a a permanent
110V supply. The permanent/keyswitch 230V powers a relay inside the fitting to hold off the 110V. In the event of a power cut the relay closes and the 110V then powers the 1 foot florescent.The lad was struggling with working out what was going off and it not helped by the fact you cannot take photos or make a phonecall.
I only use yellow and blue because of Ukraine.
Bill
No inmates experienced with alarm systems that he could ask?
:-)
Have something to add? Share your thoughts — no account required.
Ask the community — no account required