Text in force at CS25-28: from CS25-18, effective 24 Jun 2016.
(See AMC 25.1360)
(a) Shock. The electrical system must be designed so as to minimise the risk of electric shock to crew, passengers and servicing personnel and also to maintenance personnel using normal precautions. (See AMC 25.1360 (a) and CS 25.899.) (b) Burns. The temperature of any part, which has to be handled during normal operation by the flight crew, must not be such as to cause dangerous inadvertent movement, or injury to the crewmember. (See AMC 25.1360 (b))
ED Decision 2016/010/R · Source