FCU, bathroom light

[nick182]

hey guys,,

ive been asked to wire this bathroom light to an existing FCU for a friend and it turns out that i cant use that FCU.. so would i wire an FCU from an existing socket outlet to the FCU then to the switch? i have looked through all of my books but cant pin point an answer. Im a little concerned as the bathroom is upstairs and so is the socket outlet (which is not protected by an rcd.) The manufacturers instructions are pretty much useless. http://www.heatnlight.co.uk/S451_IB.pdf



I have a lot of idea's as to how i should wire this up but im sure that im missing out on something....
any insight would be of great help

thanks...


Nick

 

[malcolmsanford]

Just being the devil's advocate here in this scenario of installing an outside light in an existing installation, where in the regs does it say ,that if there is no existing Protective equipotential bonding in place you have to fit it.

 

[Geordie Spark]

And just to be contriversal why would fixing a light on the outside wall of a house/outbuilding have any affect on the lack of water/gas bonding. Some of these regs are just plain daft and homeowners can see that.

Now if the homeowner wants extra sockets in the hose that's another matter.

Then we get involved with the added complication of I P ratings !!!!

 

[Richard Burns]

Just being the devil's advocate here in this scenario of installing an outside light in an existing installation, where in the regs does it say ,that if there is no existing Protective equipotential bonding in place you have to fit it.

132.16 No addition or alteration, temporary or permanent, shall be made to an existing installation, unless it has been ascertained that the rating and the condition of any existing equipment, including that of the distributor, will be adequate for the altered circumstances. Furthermore, the earthing and bonding arrangements, if necessary for the protective measure applied for the safety of the addition or alteration, shall be adequate.

If there is a fault on the light circuit that may cause extraneous conductive parts to become live then the earthing and bonding must be adequate; therefore if it is not adequate this must be addressed first.
Presumably if this is a class II light then the earthing and bonding would not need upgrading?

 

[Deleted member 9648]

132.16 No addition or alteration, temporary or permanent, shall be made to an existing installation, unless it has been ascertained that the rating and the condition of any existing equipment, including that of the distributor, will be adequate for the altered circumstances. Furthermore, the earthing and bonding arrangements, if necessary for the protective measure applied for the safety of the addition or alteration, shall be adequate.

If there is a fault on the light circuit that may cause extraneous conductive parts to become live then the earthing and bonding must be adequate; therefore if it is not adequate this must be addressed first.
Presumably if this is a class II light then the earthing and bonding would not need upgrading?

Just to be picky.....you mean conductive parts

 

[Richard Burns]

Yeah OK, I was thinking only of bonding despite writing earthing and bonding, exposed and / or extraneous conductive parts / CPCs!

 

[malcolmsanford]

132.16 No addition or alteration, temporary or permanent, shall be made to an existing installation, unless it has been ascertained that the rating and the condition of any existing equipment, including that of the distributor, will be adequate for the altered circumstances. Furthermore, the earthing and bonding arrangements, if necessary for the protective measure applied for the safety of the addition or alteration, shall be adequate.

If there is a fault on the light circuit that may cause extraneous conductive parts to become live then the earthing and bonding must be adequate; therefore if it is not adequate this must be addressed first.
Presumably if this is a class II light then the earthing and bonding would not need upgrading?

Exactly what I mean Richard I think a lot of the industry blanket do something because it is conceived to be "in the regs", when it isn't.

That is exactly the reg in question and it's the part you highlighted mate, and the words protective measure applied and adequate

I'm not saying that bonding is not desired I think it is, but in this case where as you say it could be double insulated, there would be no chance of your work being near or close to any extraneous conductive parts, and because of the lack of bonding you decided to fit additional protection or it already has additional protection by RCD, do you not think that all of this would comply with the regulation?