Key switch for emergency lights

[westward10]

Is it the same lamp powered by the switched live as the battery

You turn off the switched live ,the lamp goes out and then the key switch brings it back on to prove the backup system ?

A maintained emergency light can act in the same way as a normal general light the only difference being the separate permanent supply controlled by the test facility. Aside from that it will switch on and off like any normal light. A maintained fitting will generally have four terminals L1, L2, N and earth although manufacturers may identify the terminals different for L1 and L2.

 

[Mikegh]

A maintained emergency light can act in the same way as a normal general light the only difference being the separate permanent supply controlled by the test facility. Aside from that it will switch on and off like any normal light. A maintained fitting will generally have four terminals L1, L2, N and earth although manufacturers may identify the terminals different for L1 and L2.

Ya I'm familiar with that

What about the led why bother with on/off

 

[westward10]

Ya I'm familiar with that

What about the led why bother with on/off

I'm not sure what you mean.

 

[Mikegh]

I'm not sure what you mean.

Why bother using it as a general light with backup

With LEDs characteristics long life and low power

I would have thought just keyswitch to L1+L2 and permanently maintained

 

[Mikegh]

Can happen sometimes in an emergency that the general lighting isn't on

Makes sense then to leave the led permanently maintained

 

[westward10]

Why bother using it as a general light with backup

With LEDs characteristics long life and low power

I would have thought just keyswitch to L1+L2 and permanently maintained

This type of light would of the same type as the general lighting for aesthetics not the bulkhead style you may be thinking off therefore it operates in the same way as all the other fittings.