the-Regs : BS7671 18th Edition Online Training
BS 7671: 18th Edition Wiring Regulations – Study when you want and pass your exam when you're ready…
In a TN earthing system the cornerstone of protection against electric shock is that the protective device ‘circuit breaker’ shall not exceed it’s maximum disconnection time. For a 230 v to earth TN system (covers both single phase and 3-phase) that is 0.4 seconds (final circuits less than or equal to 32A) see T41.1 and 5 seconds (distribution circuits and >32A) see … Read more
The following safe isolation procedure could save your life. If you have no experience and/or knowledge then you can’t avoid the dangers that are present and you should not be working on any electrical circuits or equipment. If in doubt always consult a competent (electrically skilled) person. Select an approved tester (see GS38). Inspect to … Read more