What is considered a hazardous electrical location?

What is considered a hazardous electrical location?

The National Electrical Code (NEC) defines hazardous locations as those areas “where fire or explosion hazards may exist due to flammable gases or vapors, flammable liquids, combustible dust, or ignitable fibers or flyings.” A substantial part of the NEC is devoted to the discussion of hazardous locations.

What do Class 1 hazardous location areas contain?

flammable gases
Class I Locations A “Class I Location” is created by the presence of flammable gases or vapors in the air in sufficient quantities to be explosive or ignitable. When these materials are found in the atmosphere, a potential for explosion exists if an electrical or other source of ignition is present.

Where is a proper location for installation of an electrical receptacle?

The National Electrical Code (NEC) doesn’t require a certain direction. The NEC allows outlets to be installed with the ground plug hole facing up, down or sideways. It’s up to you, there is no standard electric outlet orientation. So that means there really is no such thing as upside down outlets.

Which type of cable is allowed in hazardous locations?

As the permissible cable types for hazardous areas are TC-ER-HL and MC-HL, cable glands approved to UL 2225 are designed to work with these cables. Additionally, since flexible cord is permitted, subject to certain restrictions, cable glands are also evaluated for use with this type of cable.

Is NEMA 4X good for Class 1 Div 2?

We recommend electrical enclosures meet or exceed a NEMA rating of Type 4 or Type 4X for use in a Class1 Div2 hazardous location when used with appropriate purge systems.

Why are outlets upside down in hospitals?

Because if a cord or wire were to fall down on a partially plugged in right-side up outlet you would short out between the hot and the neutral. When the outlet is “upside down” in the above situation the wire would touch ground first.

Which raceways may be used in hazardous locations?

Rigid metallic conduit (RMC) is a dependable solution for electrical raceways in hazardous environments.

What is a Class 1 location NEC?

Class I Hazardous Locations refer to facilities which deal with flammable gases, vapors, and liquids. Division 2 specifies that these flammable materials are handled, processed, or used in the defined hazardous location, but are not normally present in concentrations high enough to be ignitable.

Does NEMA 4X meet Class 1 Div2?

What is the difference between NEMA 3R and 4X?

A NEMA 4 rating is the same as a NEMA 3 rating, but it adds protection against hose directed water. The testing for NEMA 4 consists of spraying the enclosure with water at 65 gallons per minute from a 1-inch hose. This is a lot more water than in the NEMA 3 test, which is a water spray at 5 psi.

What does the green dot on a receptacle mean?

hospital-grade
The green dots indicate that the UPS outlets and plug are certified as hospital-grade and may be used within patient-care vicinities.

What does a red outlet in a hospital mean?

emergency backup power
The red outlets (sometimes referred to as sockets) in hospitals and medical facilities indicate that they are on emergency backup power. The bright red color helps nurses, doctors, and hospital staff quickly and clearly identify where to plug in critical equipment during an emergency situation.

Which type of conduit is most suitable for use in corrosive locations?

PVC Conduit PVC is an excellent corrosion resistant material and doesn’t break down in corrosive environments like salt water or chemical exposure.