IEC 309 MA Range Multiple sockets and adaptor for industrial and domestic uses, protected and watertight - The IEC 309 MA range is a range of multipliers, adapters and shunts.Available for currents of 16, 32 and 63A with different combinations in terms of number of outputs and polarity.These products should be considered supplementary to the system as they are only suitable for use in temporary installations and mobile connections, and they have not been designed for permanent applications.