BigSi
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- Reaction score
- 55
[FONT=&]I was talking to one of my friends who just had his NICEIC DI assessment (about five months ago). We got talking about RCD trip times, because he was told that what he believed in (and myself) was wrong?[/FONT]
[FONT=&]
RCD (30mA) TRIP TIMES (17[SUP]th[/SUP] Edition Regulation 411.3.2.2. – Table 41.1)[/FONT]
[FONT=&]For a nominal a.c.voltage not exceeding 230v, disconnection times are not exceed[/FONT]
[FONT=&] For a final circuit not exceeding 32A in a TT system 200ms (0.2 sec)[/FONT]
[FONT=&] For a final circuit exceeding 32A in a TT system 1000ms (1 sec)[/FONT]
[FONT=&] For a distribution circuit in a TT system 1000ms (1 sec)[/FONT]
[FONT=&]For a final circuit not exceeding 32A in a TN system 400ms (0.4 sec)[/FONT]
[FONT=&] For a final circuit exceeding 32A in a TN system 5000ms (5 sec)[/FONT]
[FONT=&] For a distribution circuit in a TN system 5000ms (5 sec)[/FONT]
[FONT=&]He was also saying that when you peform an Inspection & Test, if the consumer unit isn’t a 17[SUP]th[/SUP] edidion board, it needs upgrading. [/FONT]
[FONT=&]My take was that as long as it complied with the current regulation at that time (16[SUP]th[/SUP] Eddition), and didn’t pose any additions risks (all circuits protected by RCD’s, etc), than it would be fine. Or give it a Code 3 – improvement recomended. [/FONT]
[FONT=&]
RCD (30mA) TRIP TIMES (17[SUP]th[/SUP] Edition Regulation 411.3.2.2. – Table 41.1)[/FONT]
[FONT=&]For a nominal a.c.voltage not exceeding 230v, disconnection times are not exceed[/FONT]
[FONT=&] For a final circuit not exceeding 32A in a TT system 200ms (0.2 sec)[/FONT]
[FONT=&] For a final circuit exceeding 32A in a TT system 1000ms (1 sec)[/FONT]
[FONT=&] For a distribution circuit in a TT system 1000ms (1 sec)[/FONT]
[FONT=&]For a final circuit not exceeding 32A in a TN system 400ms (0.4 sec)[/FONT]
[FONT=&] For a final circuit exceeding 32A in a TN system 5000ms (5 sec)[/FONT]
[FONT=&] For a distribution circuit in a TN system 5000ms (5 sec)[/FONT]
[FONT=&]He was also saying that when you peform an Inspection & Test, if the consumer unit isn’t a 17[SUP]th[/SUP] edidion board, it needs upgrading. [/FONT]
[FONT=&]My take was that as long as it complied with the current regulation at that time (16[SUP]th[/SUP] Eddition), and didn’t pose any additions risks (all circuits protected by RCD’s, etc), than it would be fine. Or give it a Code 3 – improvement recomended. [/FONT]