DECMS
  1. ✓Find scope
  2. 2Governing rule
  3. 3Resolve conflicts
  4. 4Verify equipment

Step 2: Read the governing requirement. On the feature page, start with the Most Restrictive Requirement, then review applicable standards and the lead authority.

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FOW-ELE-040Medium

Lightning Protection – Building 100

Lightning Protection – Building 100: design, construction and commissioning within a defense energetics production facility.

Most Restrictive Requirement
NFPA 70

NEC Class/Division classification governs; IEC Zone equipment requires NRTL listing.

Design Criteria

Hazardous Area Classification
Class I Div 1 / Zone 1
NFPA 70 Art. 500/505
Sprinkler / Deluge Density
0.20 gpm/ft²
NFPA 70 Ch. 11

Illustrative values — confirm against the cited edition before design use.

Summary

Discipline
Electrical
Category
Electrical
Risk Level
Medium
Approval Authority
Electrical Safety Authority
Standards Applied
11 across 7 families
Verified Links
4 of 11 approved
Common Equipment
Purged Enclosure (Type X), Lightning Protection System, Variable Frequency Drive, Pad-Mounted Transformer

Applicable Standards (11)

Electrical
Hazardous Areas

Governing Authorities

  • Electrical Safety Authority
    Electrical AHJ · Electrical installations, arc flash, hazardous locations
    Lead
  • Installation DPW
    Directorate of Public Works · Utilities tie-in, O&M acceptance
  • AHJ
    Authority Having Jurisdiction · Code interpretation and final acceptance

Highest Risk Items

  • Arc flash at switchgearHigh
    Engineering controls, third-party verification and AHJ acceptance testing.
  • Lightning strike in explosive areaMedium
    Administrative controls, periodic inspection and documented procedures.

Known U.S. / European Conflicts (16)

NFPA 70↔IEC 60364· Low-voltage installationsPartial
Partial alignment; supplemental U.S. testing or documentation required.
NEC Art. 505↔IEC 60079-14· Zone installationsSimilar
Requirements broadly equivalent; document equivalency in design analysis.
NFPA 69↔DIN EN 14373· Explosion suppressionPartial
Partial alignment; supplemental U.S. testing or documentation required.
NFPA 654↔VDI 2263· Combustible dustPartial
Partial alignment; supplemental U.S. testing or documentation required.
29 CFR 1910.119↔1999/92/EC· Process safety / workplace explosionSignificant Difference
Fundamental differences; requires AHJ/NRTL review and likely redesign or re-certification.
NEC Art. 506↔IEC 60079-10-2· Dust zone classificationSimilar
Requirements broadly equivalent; document equivalency in design analysis.
UFC 4-020-01↔IEC 60079-14· Motor efficiencyPartial
Partial alignment; supplemental U.S. testing or documentation required.
NFPA 70↔DIN EN ISO 13849-1· Enclosure ratingsSimilar
Requirements broadly equivalent; document equivalency in design analysis.
NFPA 654↔EN 1993· Emergency stop circuitsPartial
Partial alignment; supplemental U.S. testing or documentation required.
IEEE 142↔IEC 60079-14· Transformer designPartial
Partial alignment; supplemental U.S. testing or documentation required.
UFGS 25 05 11↔IEC 60079-14· Fire dampersPartial
Partial alignment; supplemental U.S. testing or documentation required.
UFGS 28 31 76↔IEC 60079-14· Lifting gearPartial
Partial alignment; supplemental U.S. testing or documentation required.
UFGS 26 05 00↔EN 764-7· UPS systemsSignificant Difference
Fundamental differences; requires AHJ/NRTL review and likely redesign or re-certification.
NFPA 20↔IEC 60079-14· Grounding gridsPartial
Partial alignment; supplemental U.S. testing or documentation required.
NEC Art. 506↔EN 1993· Anchor boltsPartial
Partial alignment; supplemental U.S. testing or documentation required.
UFC 3-401-01↔IEC 60079-14· HydrotestPartial
Partial alignment; supplemental U.S. testing or documentation required.

Equipment Impacted (5)