MCB or RCBO

[MerlinGremlin]

Got sent to a job today for an outside lighting issue, basically to cut a long story short I'm taking the new supply from a different DB so will be installing a new circuit to feed the time clock, so I put down for a Type C 20amp RCBO as the lights are wired in 2.5mm cable and LED floods. I got a phone call from my Manager to ask why I was putting an RCBO in and that it only needed to be an MCB, so after a heated discussion I was told that it will be an MCB going in not a an RCBO.
My argument was that as I'm installing a new supply it has to be compliant to currents regs so an RCBO was required. If I'm wrong can someone please tell me why and if anyone knows what reg states it needs to be protected by an RCBO could they post it on here as I'm about to drive so won't be able to look it up until I get in tonight. Thanks

 

[Octopus]

so I put down for a Type C 20amp RCBO as the lights are wired in 2.5mm cable and LED floods.

Installation method?

 

[Pete999]

Got sent to a job today for an outside lighting issue, basically to cut a long story short I'm taking the new supply from a different DB so will be installing a new circuit to feed the time clock, so I put down for a Type C 20amp RCBO as the lights are wired in 2.5mm cable and LED floods. I got a phone call from my Manager to ask why I was putting an RCBO in and that it only needed to be an MCB, so after a heated discussion I was told that it will be an MCB going in not a an RCBO.
My argument was that as I'm installing a new supply it has to be compliant to currents regs so an RCBO was required. If I'm wrong can someone please tell me why and if anyone knows what reg states it needs to be protected by an RCBO could they post it on here as I'm about to drive so won't be able to look it up until I get in tonight. Thanks

Got sent to a job today for an outside lighting issue, basically to cut a long story short I'm taking the new supply from a different DB so will be installing a new circuit to feed the time clock, so I put down for a Type C 20amp RCBO as the lights are wired in 2.5mm cable and LED floods. I got a phone call from my Manager to ask why I was putting an RCBO in and that it only needed to be an MCB, so after a heated discussion I was told that it will be an MCB going in not a an RCBO.
My argument was that as I'm installing a new supply it has to be compliant to currents regs so an RCBO was required. If I'm wrong can someone please tell me why and if anyone knows what reg states it needs to be protected by an RCBO could they post it on here as I'm about to drive so won't be able to look it up until I get in tonight. Thanks

Got sent to a job today for an outside lighting issue, basically to cut a long story short I'm taking the new supply from a different DB so will be installing a new circuit to feed the time clock, so I put down for a Type C 20amp RCBO as the lights are wired in 2.5mm cable and LED floods. I got a phone call from my Manager to ask why I was putting an RCBO in and that it only needed to be an MCB, so after a heated discussion I was told that it will be an MCB going in not a an RCBO.
My argument was that as I'm installing a new supply it has to be compliant to currents regs so an RCBO was required. If I'm wrong can someone please tell me why and if anyone knows what reg states it needs to be protected by an RCBO could they post it on here as I'm about to drive so won't be able to look it up until I get in tonight. Thanks

Is your manager an Electrician, or is he a jobsworth, you are qualified, you make the decision imo

 

[MerlinGremlin]

It's clipped direct for about 30 cm then goes into some trunking and outside to a Wiska box! Personally myself I'd redo it in conduit and do a proper job. My Manager is a spark but don't agree with everything he says.

 

[Pete999]

It's clipped direct for about 30 cm then goes into some trunking and outside to a Wiska box! Personally myself I'd redo it in conduit and do a proper job. My Manager is a spark but don't agree with everything he says.

A jobsworth then? Do the install how he want's it done and give him the certificate to sign, if you are right stick to your guns, because as sure as eggs are eggs if you take his advice and it goes ---- up he is going to firmly stick it to you.

 

[MerlinGremlin]

Basically haha we've had a few instances recently with him telling not only myself but other Engineers that are C2 codings on are EICR are in fact C3 codings even though he's not the one doing the inspection and testing just going through the paperwork, it's a joke.

 

[westward10]

It's clipped direct for about 30 cm then goes into some trunking and outside to a Wiska box! Personally myself I'd redo it in conduit and do a proper job. My Manager is a spark but don't agree with everything he says.

Why do you think it needs an rcbo, from what you say and assuming it is a TN system I see no reason why it should.

 

[westward10]

Basically haha we've had a few instances recently with him telling not only myself but other Engineers that are C2 codings on are EICR are in fact C3 codings even though he's not the one doing the inspection and testing just going through the paperwork, it's a joke.

Some Codings can be judged from a distance after maybe a discussion with the person who did the EICR.

 

[LeeH]

Why do you think it needs an rcbo, from what you say and assuming it is a TN system I see no reason why it should.

Me Neither.

Can somebody tell me why when the cable is not buried.

 

[telectrix]

as above. @ OP, what reg. can you quote stating the need for RCD protection?

 

[buzzlightyear]

rcbo or rcd protection if buried in a wall .

 

[Dave OCD]

But these are outside lights,so for a minimal additional cost why not incorporate additional protection with an RCBO, I don't just automatically omit things because the regs don't deem it necessary, why not improve on the minimum required standards using common sense now and again ?

 

[westward10]

But these are outside lights,so for a minimal additional cost why not incorporate additional protection with an RCBO, I don't just automatically omit things because the regs don't deem it necessary, why not improve on the minimum required standards using common sense now and again ?

That is personal preference, the op is up in arms because he has been told it doesn't need an rcbo and from what he says it doesn't.

 

[The Ghost]

I don't think there is any compelling argument for an RCBO in this instance. Or for that matter anything in the regs that mandate RCD protection for spots outside. The regs speak of portable equipment for use outside, sockets up to xa and cable buried in walls. And there is special locations for lights I suppose. However I would agree with @Dave OCD why not when for a few pounds more you could make it safer still. However I imagine cost is the bottom line here.

 

[LeeH]

But these are outside lights,so for a minimal additional cost why not incorporate additional protection with an RCBO, I don't just automatically omit things because the regs don't deem it necessary, why not improve on the minimum required standards using common sense now and again ?

My argument was that as I'm installing a new supply it has to be compliant to currents regs so an RCBO was required.

Maybe common sense but it's an additional expense the 'boss' might have not catered for.

And the discussion was why he thought the 'regs' said it was required and his boss was a divvy.