Section 5 Electrical installations

5.1.1 Electrical equipment is to comply with the requirements of a relevant National or International Standard, due consideration being given to the environmental conditions envisaged, e.g. in areas of high ambient temperature, de-rating may be necessary.

5.1.2 Installations are to be designed in accordance with Pt 6, Ch 2 Electrical Engineering of the Rules for Ships or with a recognised National or International Standard or Code of Practice.

5.1.3 All electrical equipment is to be installed and tested to the Surveyor’s satisfaction. The testing and trials described in Pt 6, Ch 2, 21 Testing and trials of the Rules for Ships are to be satisfactorily carried out as appropriate.

5.1.4 When the lifting appliance to be classed is a mechanical lift dock, the following documentation is to be submitted for consideration:

1. Arrangement plan and circuit diagram of switchboard(s).

2. Diagram of wiring system including cable size, type of insulation, normal working current in the circuits and the capacity, type and make of protective devices.

3. Calculations of short-circuit currents at main busbars, subswitchboard busbars and the secondary side of transformers.

5.2.1 The electrical equipment is to be examined and tested for compliance with the appropriate National or International Standard.