NEMA 7 Panel Enclosures & NEMA 7 Explosion Proof Panel Boards
As per NEMA 7 standard, Panelboards are designed to protect from an internal explosion without causing external damage. These enclosures are intended for inner use in dangerous locales classified as Class I, Division I, Groups A, B, C, or D
NEMA 7 Type panelboard operations
A typical illustration of a NEMA 7 panelboard would be a cast iron panelboard used for electrical controls for chemical factories or crude oil & gas product installation where the panelboard ( with electrical parts) is located near a dangerous area of combustive feasts. NEMA 7 enclosures are generally used in chemical factories, oil and gas installations, and other industries located near dangerous areas of combustive areas.
NEMA 7 Closes are generally more expensive than NEMA 4X enclosures.
Class I locales are defined by the National Electrical Code( NEC) as locales in which ignitable or vapors are or may be present in the air in amounts sufficient to produce explosive or flammable fusions.
Groups A, B, C, or D The markers Group A, B, C, and D are given to the following gas or vapor independently acetylene; hydrogen; ethylene, and gasoline. Class I locales are divided into these scribbled groups determined by the specific gas or vapor involved because different accouterments have different ignition and explosion characteristics.
Division I These class and group locales are further classified according to whether dangerous attention of ignitable gas or vapors is likely to do in the course of normal operations – Division I – or only in the case of an accident or working condition error– Division II.
NEMA 7 enclosures are designed to be featherlight and erosion resistant. Closes include integral, cast-on mounting lugs slotted for ease of field installation and invariant wall consistency for ease of installation of control bias, windows and conduit openings.
- Explosionproof Control Enclosures
- Explosionproof Drivers
- Explosionproof MCCB lighting and power distribution panel boards
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