fire alarms rcd protection?

[mcm]

What would be best to gain rcd protection on a school fire alarm?.

Had to move a break glass over and all the cables in the system is in the walls. What would be best to gain rcd protestion due to the board being old would be hard to get hold of a RCBO.

Any thoughts?

 

[Dunc]

Is it a 230V fire alarm system (old style)? Most fire alarms are ELV (24V) or bus based so wouldn't need RCD protection. If it is a 230V system sling a bit of pyro in the wall, that way you definitely won't need RCD protection.

 

[Paul.M]

Please correct me if I'm wrong lads:-

Why would you need RCD protection in a none residential building unless its a spec for schools etc?

If it is a 230V fire alarm system, why would you have it on an RCD (apart from safety) which could be switched off from a nuisance trip not related to the fire alarm? (back up batterys I can understand).

These are questions for my own understanding more than anything else.

 

[Dunc]

Please correct me if I'm wrong lads:-

Why would you need RCD protection in a none residential building unless its a spec for schools etc?

If it is a 230V fire alarm system, why would you have it on an RCD (apart from safety) which could be switched off from a nuisance trip not related to the fire alarm? (back up batterys I can understand).

These are questions for my own understanding more than anything else.

Cables buried in walls at depths of <50mm which do not incorporate earthed armouring or sheath would require additional 30mA RCD protection regardless of the building the installation was in. However, i cannot imagine a school having a 230V fire alarm system not wired in MICC (pyro) and i would imagine it unlikely that they would have a 230V system at all considering the level of renovation that is going on in most UK schools in my experience.

 

[Paul.M]

Cables buried in walls at depths of <50mm which do not incorporate earthed armouring or sheath would require additional 30mA RCD protection regardless of the building the installation was in. However, i cannot imagine a school having a 230V fire alarm system not wired in MICC (pyro) and i would imagine it unlikely that they would have a 230V system at all considering the level of renovation that is going on in most UK schools in my experience.

Thank you Dunc, my assumptions were correct. I've no experience in this field but its always good to learn something that interests me, cheers.