Supply voltage from supplier side

Type of wiring installation done in the system

Current carrying capacity of installation

Type of wiring material used

Copper

Aluminium

Nichrome

Silver

Porcelain

Ceramic

Ebonite

Bakelite

Near the outer seating

Inside a hollow tube

Out side the body

Below the body

For the uniform distribution of heat

To prevent the heating element from coming out of grooves

To reduce the space for coiled heating element

To increase the resistance of the heating element