Question 1
Why are plastic or metal bushings used where conduits enter electrical enclosures?
Question 2
Which tool is commonly used to pull conductors through installed conduit?
Question 3
Which component is used to allow for the movement of conduit due to thermal expansion or contraction in long outdoor runs?
Question 4
Which component must be installed in a long, straight run of outdoor PVC conduit to allow for changes in length caused by seasonal temperature variations?
Question 5
Which of the following describes the correct installation of an expansion fitting in a long run of PVC conduit outdoors?
Question 6
Which type of conduit fitting is specifically used to allow for the movement of conduit due to thermal expansion or contraction in long outdoor runs?
Question 7
A feeder calculation for a small commercial building includes lighting, receptacles, HVAC, and a future expansion load. Which load category is MOST likely to be treated as a continuous load for sizing?
Question 8
You are planning a new service for a small commercial building. The calculated demand load is close to the existing 200 A service rating, and future expansion is expected. What is the BEST design approach?
Question 9
A rooftop conduit serving HVAC equipment passes through an area with large seasonal temperature swings. Which installation detail helps accommodate thermal expansion of the raceway?
Question 10
A straight run of $1$-inch Rigid Metal Conduit (RMC) has a length of $150$ feet. Assuming the conduit is installed in a location with a $30^{\circ}\text{C}$ temperature variation, what is the minimum required size for the expansion joint, given that the expansion/contraction rate for steel is $0.0000065$ inches/inch/$\Delta^{\circ}\text{F}$?
Question 11
Rigid or EMT metallic conduit must be supported at intervals not exceeding typical code limits. Conceptually, why is conduit support important?
Question 12
What must be considered when installing PVC conduit in an area with a 40°F temperature swing?
Question 13
PVC conduit installed outdoors is subject to temperature changes. What must be installed to prevent damage?
Question 14
What is the purpose of an 'expansion fitting' in a long run of PVC conduit?
Question 15
Which type of fitting is required when conduit crosses a building expansion joint?