Flame proof motors are designed for

(i) explosive atmosphere

(ii) moisture free atmosphere

(iii) dust free atmosphere

Select the CORRECT option from the given options.

The correct answer is option 3): ((i) only)

Concept:

• Flameproof motors are designed to withstand the pressure caused by an internal explosion without incurring any damage and are also able to prevent flame propagation outside.
• Flameproof design is one of the explosion protection techniques extensively used for light fittings, JBs, and motors in hazardous areas.
• This is certified by IEC but is predominantly followed in India and is also governed by local IS standards.
• Flameproof motors are used in hostile and hazardous environments where it is prone to various implications like fire, short-circuit, and more. Industrial areas and manufacturing plants widely use flameproof motors.