EGSA EGSA Safety Standards and Code Compliance 2

Question 1

What is the minimum headroom clearance typically required around a generator set for safe maintenance access per NFPA 110 and manufacturer guidelines?

Accepted Answer

18 inches on all sides with 3 feet on the service side

Answer

NFPA 110 and manufacturer guidelines generally require a minimum of 3 feet on the service side and 18 inches on non-service sides to allow safe inspection and maintenance.

Question 2

What is required by NFPA 110 regarding periodic testing of Level 1 generator systems?

Accepted Answer

Monthly testing and annual testing under load for at least 30 minutes at 30% of nameplate rating or greater

Answer

NFPA 110 requires monthly exercise tests and annual load tests of at least 30 minutes at a minimum of 30% nameplate rating to verify system readiness.

Question 3

Under NEC Article 700, emergency system wiring must be kept independent from normal wiring. What is the primary reason for this requirement?

Accepted Answer

To prevent a fault on the normal system from disabling the emergency system

Answer

Keeping emergency wiring separate ensures that a fault, fire, or failure in the normal power system cannot simultaneously disable the life-safety emergency circuits.

Question 4

What is the function of a remote annunciator panel on a generator installation as required by NFPA 110?

Accepted Answer

Display alarm and status conditions of the EPSS at a continuously attended location

Answer

NFPA 110 requires a remote annunciator at a continuously attended location to display critical alarm conditions such as high coolant temperature, low oil pressure, and overcrank.

Question 5

Which safety precaution is critical when working on a generator set that is paralleled with the utility grid?

Accepted Answer

Ensure the generator is properly isolated, synchronized protection is disabled, and permits are obtained before any work

Answer

When a generator is paralleled with the utility, isolation requires proper permitting, de-energization of all parallel paths, and confirmation that the unit is fully de-coupled before any maintenance work.

(EGSA) Electrical Generating Systems Association Certified Practice Test

(EGSA) Electrical Generating Systems Association Certified Practice Test

EGSA EGSA Safety Standards and Code Compliance 2