To maintain constant terminal voltage

To supply the power to the auxiliary circuits

To control the supply voltage to the contactor

To protect the control elements from over voltage fault

By manual operation

By mechanical settings

By operating electromagnet to change the position

By using bimetallic strip to change the position

Sleeves

Wire ferrules

Lugs and thimbles

Cable binding straps and button

By using sleeve

By using Grommets

By using cable binding straps

By providing nylon cable ties

Proper type of protection and measuring system

Inside area and number of indicating lights in front panel

Suitable method of labelling and cable harnessing

Outside dimensions and swing area of cabinet door