Every connection shall be accessible for inspection, testing and maintanence, except for the following:
(i) A joint designed to be buried in the ground
(ii) A compound-filled or encapsulated joint
(iii) A connection between a cold tail and the heating element as in ceiling heating, floor heating or a trace heating system
(iv) A joint made by welding, soldering, brazing or appropriate compression tool
(v) A joint forming part of the equipment complying with the appropriate product standard.
(vi) Equipment complying with BS 5733 for maintenance-free accessory and marked with the symbol “MF” and installed in accordance with the manufacturer’s instructions.