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USB charger Euro modules

Arran Cameron
There have been a few discussions about 13A sockets with integrated USB charger sockets on the IET forum:

http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=62015
http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=63973
http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=63849
http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=84094
http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=104243

An alternative to a 13A socket with integrated USB charger sockets is a USB charger Euro module which can be powered via a spur from a standard 13A socket nearby. This offers several advantages over a 13A sockets with integrated USB charger sockets.

1. The USB charger module can be upgraded to a newer standard or replaced if faulty at a lower cost than a 13A socket with integrated USB charger sockets.
2. It’s possible to mix and match modules and faceplates from different manufacturers. A module that is considered the best performing or most reliable from manufacturer A can be used with a faceplate with the desired aesthetics from manufacturer B.
3. A switch can be added in series with the module to isolate it from the mains supply.
4. USB charger modules can be powered from a dedicated circuit rather than the ring main.

A few questions:

1. Has the IET done any reviews of USB charger modules from different manufacturers?
2. Are USB charger modules internally fused or is it recommended that they are connected in series with a (1A?) fuse? Fused Euro modules exist which could be installed on the same faceplate as a USB charger module.
3. Do the wiring regulations permit USB charger modules to be powered from a lighting circuit? I have thought about mounting them on the same faceplate as a light switch for the room. I am aware that the cable from the ceiling rose to the switch requires a neutral wire although some already have this.
4. Is it true that the wiring regulations do not permit mains powered Euro modules to use the same faceplate as low voltage (telephone socket, TV antenna, etc.)Euro modules?
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  • 0
    Considering separate modules only, this depends on the manufacturer's requirements for protection - similar to a manufacturer of an extractor fan requiring them to be supplied by a 1 A fuse in an FCU, but another manufacturer not?


    Unlike switches and socket-outlets, I don't think you'll find a unified approach.


    Clearly, this one from MK could be installed on a radial or ringmain protected by a B32 or C32 (see section F of the instructions) ... if you look at the specs, it will accept 3 x 2.5 sq mm as well.


    But this one from BG cannot simply be wired "in the ring" or anything other than the last device in a radial, given the terminal capacity 1 x 2.5 sq mm or 1 x 4 sq mm - even though the specs I can see don't have the info on what maximum rating protective device is recommended - I'm suspecting that the


    If the module is built into a socket-outlet to BS 1363-2:2016 (or BS 1363-2:2016+A1:2018), then the ratings and installation method should be as per BS 1363, i.e. should be OK for a radial or ringmain.


    PLEASE NOTE: I've seen on some, provision for dual earth terminals ... does this mean they might have high protective conductor currents if a number of units are installed on the same circuit (I can't see any data for this in the manufacturers' data I've looked at so far)? The particular MK Euro-Module I linked to above, appears to be Class II so probably not a problem.



    And in terms of cable size ... sized in accordance with BS 7671 as necessary for protection against overcurrent etc. with absolute minimum size as Table 52.3


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  • 0
    Considering separate modules only, this depends on the manufacturer's requirements for protection - similar to a manufacturer of an extractor fan requiring them to be supplied by a 1 A fuse in an FCU, but another manufacturer not?


    Unlike switches and socket-outlets, I don't think you'll find a unified approach.


    Clearly, this one from MK could be installed on a radial or ringmain protected by a B32 or C32 (see section F of the instructions) ... if you look at the specs, it will accept 3 x 2.5 sq mm as well.


    But this one from BG cannot simply be wired "in the ring" or anything other than the last device in a radial, given the terminal capacity 1 x 2.5 sq mm or 1 x 4 sq mm - even though the specs I can see don't have the info on what maximum rating protective device is recommended - I'm suspecting that the


    If the module is built into a socket-outlet to BS 1363-2:2016 (or BS 1363-2:2016+A1:2018), then the ratings and installation method should be as per BS 1363, i.e. should be OK for a radial or ringmain.


    PLEASE NOTE: I've seen on some, provision for dual earth terminals ... does this mean they might have high protective conductor currents if a number of units are installed on the same circuit (I can't see any data for this in the manufacturers' data I've looked at so far)? The particular MK Euro-Module I linked to above, appears to be Class II so probably not a problem.



    And in terms of cable size ... sized in accordance with BS 7671 as necessary for protection against overcurrent etc. with absolute minimum size as Table 52.3


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