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18th Edition amendment one. Volt drop measurement, who is spreading the rumour we need new testers?

Sparkingchip
Who is the test equipment manufacturer and/ or importer spreading the rumour that we will need new volt drop testers?


Out of interest I have tried an internet search for volt drop testers than can be used to test UK fixed installations and drew a blank with only testers suitable for use in the USA at lower voltages coming up in the search results along with results for auto electrics.


Andy
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  • 0
    What are you verifying the volt-drop against?


    The requirement to verify volt drop is "where required" at the moment in 643.11, but more to the point, there is some fluidity in the actual volt-drop requirements, so 525.202 states Appendix 4 Section 6.4 is a "deemed to be OK" range, but 525.1 and 525.203 permit product standards to be used for fixed current-using equipment (might permit a wider utilization voltage range) and 525.201 implies manufacturer's instructions where the product standard doesn't have a utilization voltage.


    Additionally, there is actually no requirement in Section 525 of BS 7671 to guarantee a particular voltage drop for current using equipment that's not fixed (read carefully, 525.202 refers only to 525.1 and 525.201, both of which are for fixed current-using equipment).


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  • 0
    What are you verifying the volt-drop against?


    The requirement to verify volt drop is "where required" at the moment in 643.11, but more to the point, there is some fluidity in the actual volt-drop requirements, so 525.202 states Appendix 4 Section 6.4 is a "deemed to be OK" range, but 525.1 and 525.203 permit product standards to be used for fixed current-using equipment (might permit a wider utilization voltage range) and 525.201 implies manufacturer's instructions where the product standard doesn't have a utilization voltage.


    Additionally, there is actually no requirement in Section 525 of BS 7671 to guarantee a particular voltage drop for current using equipment that's not fixed (read carefully, 525.202 refers only to 525.1 and 525.201, both of which are for fixed current-using equipment).


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