Is a 2.5 T & E cable protected by either a 30Amp rewireable fuse or a type B 32A or 30A MCB serving one twin socket only
1/ Safe ?
2/ to Regs ?
1/ Safe ?
2/ to Regs ?
JohnD said:Incidentally,a double socket is not safe for 2 loads at 13A each, it will overheat. Is rated at 13A for the two sockets together
MK said:All MK socket-outlets are manufactured to comply with BS1363 part 2: 1995 and are rated at 13A per unit. Double socket-outlets have been manufactured and tested to exceed this rating by margin that allows electrical safety and reduces the risk of heat and mechanical damage to components due to overloading. It should be noted that BS1363 part 2: 1995 does not allow double sockets to operate at twice the permissable maximum loading and it should be remembered that double socket-outlets are not manufactured to be able to withstand a 26A load for sustained periods of time.
Research by ourselves and third party organisations has shown that all MK double sockets can safely withstand a continuous load of 19.5A for an indefinite period. Increasing the load slightly will begin to cause heat and mechanical stresses on the components in a relatively short period. Testing showed that a load of 22.3A was sufficient to cause heat stress that would cause a browning of the faceplates and sufficient heat to cause insulation damage to cable cores. A load of 24A for 43 hours was sufficient to cause significant heat damage to the material in which the socket-oulet was situated and within 75 hours sufficient to cause significant damage that would lead to the very real potential of fire.
MK recommend that users of their sockets consult professional design Engineers when designing installations to avoid the possibility of heat and mechanical stress to components and installations caused by overloading of MK socket-outlets
partpdoctor said:hi eebe
are you the same eebe who lurks on the IEE forum?
ricicle said:JohnD said:Incidentally,a double socket is not safe for 2 loads at 13A each, it will overheat. Is rated at 13A for the two sockets together
I'm still not convinced on this one, was there any manufacturers proof .None of the instructions I've ever seen quote this.
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