Electrical Conduit and Fittings Quiz

Which of the following describes a Myers hub?

• A type of duct system

• A gasketed locknut

• A gasketed fitting

• An insulated bushing

Which of the following conduit bodies has a single cover opening on both sides?

• Type LB

• Type LL

• Type LR

• Type LRL

Which of the following are used to protect conductors from being damaged by the sharp edges of the threaded conduit end?

• Locknuts

• Insulated bushings

• Conduit bodies

• O-rings

Which type of conduit body does not provide a change in direction but may be used as a pulling point in a conduit run that has bends totaling more than 360°?

• Type LL

• Type LB

• Type SLB

• Type C

Boxes must be marked with the words “DANGER — HIGH VOLTAGE — KEEP OUT” if they house conductors over ____.

• 240V

• 480V

• 600V

• 1,000V

Which of the following are defined by the NEC® as separate portions of a conduit that provide access through a removable cover to the interior of the system at a junction of two or more sections?

• Conduit bodies

• Locknuts

• Insulated bushings

• O-rings

NEMA and IP classify pull and junction boxes according to the _____.

• type of material used for construction

• size of cable allowed

• size of the box

• degree of protection from the elements they provide

The abbreviation for an entrance ell (elbow) is _____.

• SLB

• ELLB

• EE

• IEEE

For a pull box housing shielded conductors carrying over 1,000V and used in an angled pull, the distance between a conductor entry and exit must be _____.

• 24 times greater than the OD of the conductor

• 30 times greater than the OD of the conductor

• 36 times greater than the OD of the conductor

• 45 times greater than the OD of the conductor

Which of the following can be used as an inexpensive alternative to a tee conduit body when running EMT?

• A Myers hub

• A standard square box with a cover

• A mogul

• A gasketed SLB