WHAT IS THE EQUIPMENT CLASS AS PER INSULATION GRADE

Electrical Safety

The Equipment Classes Considering the Insulation Level to Protect Electrical Shock

It is almost impossible to go the end of a list where electricity is necessary in our life today, and we everybody will agree that electricity is the closest friend in our daily-life.
Yes, electricity is very close friend and helping us every moment; but don’t forget, it will make no mistake to injure you even to kill by shock if you are not alert before it getting the chance.
Bearing in mind the electrical shock, a safety measure must ensures in our electricity operated home appliances and equipment. Electricity shock protection procedures are different depending on the tentative shock level.
Considering the electric-shock preventive insulation level the equipment are classified on three types as follows:
v Class-I Equipment;
v Class-II Equipment;
v Class-III Equipment.

Class-I Equipment

The electrical equipment which includes a means for connection of Exposed Metallic Parts (EMP) of the equipment to the Earth Conductor (EC) to provide protection against electric shock in case of failure of the basic insulation of the equipment or other fault condition.
Simply, the equipment which body is earthed or connected to the ground or earth through earth conductor is known as Class-I Equipment.
In this case if electrical connection go wrong and equipment body become electrified then connected earth wire drain down the current to ground and protect from dangerous electric shock if touch the equipment anyone.
The equipment like electric-heater, electric motor, electric iron etc. are under Class-I equipment.

Class-II Equipment

The electrical equipment which does not include a means for connection to an Earth Conductor (EC), but provides supplementary insulation in addition to the basic insulation of the equipment is known as Class-II equipment. This equipment also known as double insulated equipment.  
The equipment like electric hair-drier, electric hair trimmer etc. are under Class-II equipment.
To get details specifications for Class-II Equipment you can check in British Standard BS2754.

Class-III Equipment

The electrical equipment in which protection against electric shock relies on supply at Separate Extra Low Voltage (SELV) system is the source of power that shall not exceed extra low voltage (50V ac or 150V dc) between conductors or to earth, also  the voltages higher than SELV are not generated in the equipment is known as Class-III Equipment.
To get more details about Class-III equipment you can check British Standard BS2754.
Bathroom wiring and water pool wiring is followed ELV and SELV system.

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