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DPC - Please comment on the BSI site.
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<blockquote data-quote="Tony S" data-source="post: 449300" data-attributes="member: 20864"><p>RCD’s were a recommendation in the 14th, now they are more or less compulsory. AFDD’s now have a toe hold so where will it end?</p><p></p><p>I’ve got to get my arse in gear to write a comparison of BS7671 and NFPA-NEC wiring practices, particularly the supply connection to receptacles and the construction of appliance cords.</p><p></p><p>New installations are not tested as a mater of course therefore faults like high resistance connections are overlooked.</p><p></p><p>Both BS-EN62605 and UL1699 product testing methods are flawed. For example, to start a parallel arc fault requires 2,000V to initiate the test.</p><p></p><p>In the field testing equipment is almost non existent. The equipment that there is just gives a pass/fail, no reading that can be recorded.</p><p></p><p>Whereas we use tunnel terminals for most accessories the Americans use wrap around terminals. American electricians will admit they are prone to becoming loose.</p><p></p><p>Appliance cords are often figure of eight single insulated.</p><p></p><p>Receptacles are often mounted upside down so the appliance cord has to bend through 180° to reach floor level.</p><p></p><p>US appliance plugs have no OCPD built in, they rely on the circuit OCPD back in the main panel.</p><p></p><p>I’ll add more as I think of them.</p></blockquote><p></p>
[QUOTE="Tony S, post: 449300, member: 20864"] RCD’s were a recommendation in the 14th, now they are more or less compulsory. AFDD’s now have a toe hold so where will it end? I’ve got to get my arse in gear to write a comparison of BS7671 and NFPA-NEC wiring practices, particularly the supply connection to receptacles and the construction of appliance cords. New installations are not tested as a mater of course therefore faults like high resistance connections are overlooked. Both BS-EN62605 and UL1699 product testing methods are flawed. For example, to start a parallel arc fault requires 2,000V to initiate the test. In the field testing equipment is almost non existent. The equipment that there is just gives a pass/fail, no reading that can be recorded. Whereas we use tunnel terminals for most accessories the Americans use wrap around terminals. American electricians will admit they are prone to becoming loose. Appliance cords are often figure of eight single insulated. Receptacles are often mounted upside down so the appliance cord has to bend through 180° to reach floor level. US appliance plugs have no OCPD built in, they rely on the circuit OCPD back in the main panel. I’ll add more as I think of them. [/QUOTE]
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