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Technical Information and Requirements
Summary of commonly used protection methods for different Divisions and Zones
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NEC & CEC (North America) |
North America, CENELEC (European Union) & IEC (International) |
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Method of Protection |
Division |
NEC & CEC Method of Protection |
Zone |
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Intrinsic Safety |
1 or 2 |
Intrinsic Safety "ia" |
0, 1 or 2 |
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Intrinsic Safety "ib" |
1 or 2 |
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Explosion-Proof |
1 or 2 |
Flame-Proof "d" |
1 or 2 |
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Pressurization |
1 or 2 |
Pressurization "p" |
1 or 2 |
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Non-incendive equipment |
2 |
Increased Safety "e" |
1 or 2 |
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*Specifically assessed equipment |
2 |
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*No excessive heat-generating devices or ignition-capable arcing/sparking devices.
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