Magnetic lifting devices

• Pages: 110-111

18 Magnetic lifting devices1

18.1. Electrical

18.1.1. The voltage of the electric supply to any magnetic lifting

device should not fluctuate by more than ± 10 per cent.

18.1.2. (1) A magnetic lifting device should be provided with

an alternative supply of power, i.e. batteries that come into operation

immediately in the event of failure of the main power; provided that

this subparagraph need not apply to a magnet that is being used to

load or unload scrap metal or to other cargo-handling operations of

such a nature that there is no person in the vicinity other than the

driver of the lifting appliance.

(2) A magnetic lifting device should be so constructed as to

withstand the entry of moisture.

18.2. Inspection

18.2.1. A magnetic lifting device should be thoroughly examined

in accordance with the requirements of Appendix C.

18.3. Safe working load

18.3.1. (1) A magnetic lifting device should be marked with its

safe working load as determined by tests using weights of the same

characteristics as the load for which the device is intended to be used.

(2) When the load to be lifted is dissimilar to the test load, it

should be restricted to approximately 60 per cent of the safe working

load.

18.4. Precautions when in use

18.4.1. (1) The power to the magnet should not be switched on

until after the magnet has been lowered on to the load to be lifted.

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1See also sections 4.2, 17.7 and 20.6, which are applicable.