What Do You Know About Wire and Cables?

The correct answer is False because non-listed wire should not be used anywhere, including plenum areas. Plenum areas are spaces used for air circulation in buildings, such as the area above a drop ceiling or below a raised floor. These areas are required to use plenum-rated cables, which are specifically designed to have low smoke and flame spread in case of a fire. Using non-listed wire in a plenum area can pose a safety hazard as it may contribute to the spread of fire and toxic fumes. Therefore, it is incorrect to say that non-listed wire can be used anywhere other than a plenum.

EMT stands for Electrical Metallic Tubing, which is the most common type of tubing used in the security industry for raceways. EMT is made of steel and is highly durable, providing excellent protection for electrical wires and cables. It is also easy to install and is widely available, making it a popular choice for security installations. HDPE, RNC, and FMC are not commonly used in the security industry for raceways, making EMT the correct answer.

Any of the above wiring methods are permitted to be used in a ceiling area designated for environmental air. This means that EMT, flexible metal conduit, and rigid metal conduit can all be used in this specific area.

Electrical metallic tubing must be securely fastened within 3 feet of every box, cabinet, or termination fitting, and at intervals not exceeding 10 feet. This ensures that the tubing is properly supported and reduces the risk of damage or disconnection. By fastening the tubing at these intervals, it maintains stability and prevents it from sagging or becoming loose. This spacing also allows for easy access and maintenance if needed.

The question asks for a test that is not used when approving Class 2 low-voltage transformers. The options include Circuit Secondary Voltage Test, Testing for compliance with CP-01 standards when packaged as a complete assembly, Output Current and Power Test, and Rated Output Heating Test. The correct answer is Testing for compliance with CP-01 standards when packaged as a complete assembly. This means that this test is not used when approving Class 2 low-voltage transformers.

NFPA 70, 358.26

If the edge of the framing member or furring strip is less than 1¼ inch away, a 1/16 inch thick steel plate of sufficient length and width must be installed to protect the wiring method from screws and nails. This means that if the distance between the framing member or furring strip and the wiring method is less than 1¼ inch, a 1/16 inch thick steel plate should be used as a protective barrier to prevent damage to the wiring from screws and nails.

Cables or raceways that run parallel to framing members or furring strips must be protected where they are likely to be penetrated by nails or screws by installing the wiring method so it isn't less than 1 1/4 inch from the nearest edge of the framing member or furring strips. This distance ensures that the cables or raceways are adequately protected and reduces the risk of damage from nails or screws.

Wires must be protected from physical damage anytime they are within 7 feet of the floor. This is because wires that are closer to the floor are more susceptible to damage from foot traffic, furniture, or other objects that may come in contact with them. By providing protection for wires within 7 feet of the floor, the risk of damage and potential hazards such as electrical shocks or short circuits can be minimized.

NFPA 72, 2010 edition, section 27.7.1.2.4.2

NPFA 72, 2010 edition, section 27.7.1.4.1

NFPA 70, 300.15