stay safe, match your equipment to the test location bs ......stay safe, match your equipment to the...

Stay safe, match your equipment to the test location BS EN61010-1 Understanding installation categories CAT Ratings BS EN61010-1 Installation Categories (CAT ratings) deﬁne the risks from hazardous transient impulses and potentially lethal short circuit currents on the mains supply system based on where you are working. Voltage Ratings Test equipment used for measuring mains circuits will have a CAT rating to show where it can be used. Each category also has a voltage rating to show the maximum safe phase to earth system voltage, normally 50V, 100V, 150V, 300V, 600V or 1000V. Stay safe - Match your test equipment safety rating to the installation category. CAT II socket outlets and similar points of the mains installation. CAT III the distribution part of the building’s mains installation. CAT IV the supply side source of the building’s mains installation. Testers, leads and accessories all need safety ratings equivalent to, or higher than the installation category and voltage rating for the location to be safe. www.martindale-electric.co.uk Call: 01923 441717 email: [email protected]

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Stay safe, match your equipment to the test location BS EN61010-1

Understanding installation categories

CAT RatingsBS EN61010-1 Installation Categories (CAT ratings) define the risks from hazardous transient impulses and potentially lethal short circuit currents on the mains supply system based on where you are working. Voltage RatingsTest equipment used for measuring mains circuits will have a CAT rating to show where it can be used. Each category also has a voltage rating to show the maximum safe phase to earth system voltage, normally 50V, 100V, 150V, 300V, 600V or 1000V.

Stay safe - Match your test equipment safety rating to the installation category.

CAT II socket outlets and similar points of the mains installation.

CAT III the distribution part of the building’s mains installation.

CAT IV the supply side source of the building’s mains installation.

Testers, leads and accessories all need safety ratings equivalent to, or higher than the installation category and voltage rating for the location to be safe.

www.martindale-electric.co.ukCall: 01923 441717 email: [email protected]

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