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Board change
Former Community Member
If a EICR has been carried out recently 4 weeks ago, if you change the board would you be required to carryout testing on all circuits or can you reference the EICR.
You'd need to test to ensure that your new work doesn't contain any defects (e.g. your c.p.c. terminations aren't faulty, no conductors snapped after the extra wiggling or insulation hasn't been damaged by shoving the old wires through the openings in the new steel CU case) - you can't rely on any previous tests to do that.
You might also have to show that the max Zs suits the new protective devices - e.g. if replacing a 15A BS 3036 on an old 5s disconnection time circuit with B16 on a non-RCD circuit max acceptable Zs drops by over 2 Ohms - previous results might help with that (e.g. by testing to a point nearer the CU to test your work and using the previous results to confirm the loop impedance at the far end of the circuit).
You'd need to test to ensure that your new work doesn't contain any defects (e.g. your c.p.c. terminations aren't faulty, no conductors snapped after the extra wiggling or insulation hasn't been damaged by shoving the old wires through the openings in the new steel CU case) - you can't rely on any previous tests to do that.
You might also have to show that the max Zs suits the new protective devices - e.g. if replacing a 15A BS 3036 on an old 5s disconnection time circuit with B16 on a non-RCD circuit max acceptable Zs drops by over 2 Ohms - previous results might help with that (e.g. by testing to a point nearer the CU to test your work and using the previous results to confirm the loop impedance at the far end of the circuit).
