Isolation for emergency lighting

[spud1]

Hi chaps, Had a sub contractor working with us the other day who insisted the emergency lighting in the installation we were installing had to be 'isolated' by the test key switch in both the line and neutral conductors.
As far as I was aware a test key switch is a 'test facility' and there is no need for it to be a means of isolation for both line and neutral. After all it still activates the emergency light when operated ?

Any thoughts?

 

[GaryM]

Agree with you, single pole isolation for test purposes only.

 

[telectrix]

the guy's talking out of his arse.

 

[Dan23584]

Yeah sounds like a load of bull to me.

 

[telectrix]

he must be an architect.

 

[GaryM]

Or once worked for Building Control!

 

[Paul.M]

Do they even make a two pole test key switch for em lights?

 

[telectrix]

the french might.

 

[spud1]

Thanks guys thought as much, cheers

 

[millar]

they make DP key switches but they are not marked up as EM light key switches. they are blank.