The IET is carrying out some important updates between 17-30 April and all of our websites will be view only. For more information, read this Announcement

This discussion is locked.
You cannot post a reply to this discussion. If you have a question start a new discussion

Bathroom heating lights

What do electricians think of bathroom heating lights?

They are the highest power devices normally connected to a lighting circuit. Many years ago I had one with a 750W heating element. Combine this with a 100W incandescent bulb and you have a device which consumes 3.7A. Two of these devices will overload a 6A lighting circuit.

Should heating lights be designed in a way to easily connect the heating element to a different circuit than that used for the light? Alternatively, should they be powered from a ring main rather than a lighting circuit?

  • I have used a ceiling heat and light unit for many years with no trouble, supplied by a B6 M.C.B. They are very good and provide instant heat. Mine was supplied by an upstairs lighting circuit. The house had two lighting circuits. No overloading problems occurred. They can radiate heat onto your body whilst you are in the bath. Very good.

    Z.

  • If multiple such units are required, then either a dedicated circuit, or a fused connection to a ring final would be prudent.

    A single heat and light unit should be fine on a standard lighting circuit with a 5 amp fuse or 6 amp MCB.

    Consider the likely load on a typical upstairs lighting circuit in an average suburban house. Three bedrooms each with a 60 watt lamp, and another lamp on the landing.

    I would not connect two different circuits into a heat and light unit, far too much risk of dangerous confusion during future maintenance.

  • Former Community Member
    0 Former Community Member

    Given the rapid change to LED lighting the loads on lighting circuits are becoming almost negligible.

    I could safely dig out the adaptor that lets me use my smoothing iron on a lighting circuit  :-)

  • dcbwhaley: 
     

    Given the rapid change to LED lighting the loads on lighting circuits are becoming almost negligible.

    I could safely dig out the adaptor that lets me use my smoothing iron on a lighting circuit  :-)

    How would you earth the iron?

     

    Anyway we will not have affordable electricity supplies soon. Our nuclear power supply is also compromised. We have already allowed China to invest in the new plant at Hinkley Point in Somerset and the proposed new reactor at Sizewell in Suffolk. And we are still considering whether to let the Chinese build a reactor at Bradwell-on-Sea in Essex. Surely this is a security threat – allowing the Chinese into the heart of such a sensitive sector for many decades to come?

     

    Z.

  • I`ve never liked them. They were quite popular back in the day. Lighting circuit with 60W lamps, fairly rare IMHE . 100 watts for bedrooms and small rooms , more for main rooms, even 5 x chandler 60w which were duller than a good old 200W, 200W not that usual though 150w often.

    Having said all that the one such heater on a cct was often not on for hours on end so usually OK I reckon.

    There are still a lot of houses non LEDs

  • Arran Cameron: 
     

    What do electricians think of bathroom heating lights?

    The principle is wrong, relying on such inefficient, radiant heat; rather think of fan heating in the space behind an enclosed panel below a bath say or floor heating.

    Jaymack  

  • Jaymack: 
    The principle is wrong, relying on such inefficient, radiant heat; rather think of fan heating in the space behind an enclosed panel below a bath say or floor heating.

    IMHO, they are ugly, but I wouldn't go so far as to say that the principal is wrong. They are only intended to provide a bit of comfort whilst drying oneself. An old-fashioned radiant wall heater is just as good, but don't forget the supplementary bonding!

  • Jaymack: 
     

    Arran Cameron: 
     

    What do electricians think of bathroom heating lights?

    The principle is wrong, relying on such inefficient, radiant heat; rather think of fan heating in the space behind an enclosed panel below a bath say or floor heating.

    Jaymack  

    Noisy fan heaters that blow dust and dead skin flakes about, and that get clogged up with loose hair and need regular maintenance and cleaning.

     

    Z.

  • Chris Pearson: 
     

    Jaymack: 
    The principle is wrong, relying on such inefficient, radiant heat; rather think of fan heating in the space behind an enclosed panel below a bath say or floor heating.

    IMHO, they are ugly, 

    Ugly? Perhaps you would prefer this neat attractive American unit? So pretty.

     

     

    Z.

  • Radiation to heat only the individual, and not wasted on the building is very efficient in terms of comfort per watt. Obviously microwaves would be better, but there are health and safety issues with that. But it goes off  instantly and does nothing to dry the room or dispel mould.

    Personally, like their grown up relative the radiant bar heater, I rather like them.

    Talking of radiant bar heaters,  at  a push this type, with the exposed hot wire, allows you to run 110V radio kit from 240V with just a hose clip. You'd have to take the guard off, and this 3kW one is too much for a 5 A lighting cct.

    Mike.

    30364ba5597469e4378875042de0745e-original-belling-countess-3-bar-heat.jpg