What does a distribution block do?
A Distribution block is an economical and convenient way of distributing an electrical circuit from a single input source, to several devices in the branch circuit. Thus re- ducing the total number of wires in your electrical panel and saving you time and money.
Where do I install distribution blocks?
Power distribution blocks are only permitted to be installed on the line side of service equipment. Power distribution blocks ahead of service equipment must be listed and marked to indicate that they are suitable for use on the line side of service equipment.