IEC TR 61916 pdf download Electrical accessories – Harmonization of general rules 4.2 Tests Verification of resistance to heat a) for surface mounting boxes, separable covers, separable cover plates and separable frames by the test of 4.2.3; b) for accessories, with the exception of the parts, if any, covered by 1), by the tests of 4.2.1, 4.2.2 and, with the...