Design and Construction - hdbk109220040166

DOE-HDBK-1092-2004

NRTL-listed parts and UL-recognized components should be used wherever possible. An

assembly of recognized components is not equal to a listed product, but more readily enables

an independent evaluation of the assembly.

All equipment not listed by a NRTL should be constructed according to applicable standards,

such as UL, ISA, ANSI, and IEEE. Equipment for which specific standards are unavailable

should be constructed according to the principles of established standards, as determined by

the AHJ.

Equipment should be examined for safety as extensively as possible. Areas of consideration

include but are not limited to:

1. Failure modes

2. Heat effects

3. Magnetic effects

4. Grounding and bonding

5. Guarding of live parts

6. Leakage currents

7. Dielectric testing

8. Access to serviceable parts

9. Overcurrent and overtemperature protection

10. Clearances and spacing

11. Interlocks

12. Design and procedural documentation

13. Signage, labels, and administrative controls

14. Mechanical motion

15. Stored energy

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