Adjusting tripping time.

[An Buachaillín Bán]

Hi all,

Curious one and hopefully some one of you could give me some advice.

A customer has had a steeltech shed installed at their premises. A large one. Wants 3x light fittings and 5 double sockets intalled. There's an electric roller shutter door on the shed also to be plugged in. My plan was to run a 6sq cable out from house DB, and put a little enclosure in shed with rcbos for lights and sockets, all backed up by a 32 or 40A mcb at house DB.

Customer stated that because the electric roller shutter is the only means of accessing the shed, that in the event of a power failure he'd have to smash a window to get into shed to open the shutter manually from the inside. And so he's requesting if there's any way the power in the house DB would trip first rather than the shed DB in event of power failure to shed. Hope this makes sense.

Any advice would be much appreciated in how to approach this

 

[davesparks]

Not if the OCPD at the supply end is an mcb.

It doesn't matter what is at the supply end as that will be accessible to reset without having to get past the roller shutter.

 

[littlespark]

I’d say it’s a fire risk, and the door company would have regulations on fitting an electric door with no other means of escape.

Those manual wind up gearing on doors take an absolute age to lift.

 

[davesparks]

Those manual wind up gearing on doors take an absolute age to lift.

If you think that's bad you should try manually winding out the safety curtain in a theatre.