Pairwise standards relationships (site data) — n/a — relationship summaries derived from the standards pages
Content status
Reviewed
Coverage
Interactive side-by-side of editorial relationship summaries; not clause-level equivalence.
Last reviewed
August 2026
Primary reference
The official published standard — required for final decisions
Confirm the governing edition, jurisdiction, and project-specific requirements
before applying anything on this page.
Crosswalks
Standards Comparison
Select two standards to view their overlap matrix. Only pairs with documented crosswalk data are shown.
vs
No documented crosswalk exists for this pair in the reference library.
See the Crosswalks index for available comparisons,
or consult individual standard pages for relationship context.
## NFPA 79:2024 vs IEC 60204-1:2016+AMD1:2021
Both cover electrical equipment of machines. Use when designing for US + EU markets. Design to the **most restrictive** requirement from each standard.
[View full crosswalk →](../nfpa79-iec60204/)
| Topic Area | NFPA 79 | IEC 60204-1 | Equivalence |
|------------|---------|-------------|-------------|
| Scope boundary | Ch. 1 | Clause 1 | High |
| Incoming supply / Disconnect | Ch. 5 | Clause 5 | Very High |
| Protection against electric shock | Ch. 7 | Clause 6 | High |
| Equipment protection (overcurrent) | Ch. 6 | Clause 7 | High |
| Grounding / Bonding | Ch. 8 | Clause 8 | Very High |
| Control circuits / E-stop | Ch. 9 | Clause 9 | Very High |
| Operator interface | Ch. 10 | Clause 10 | High |
| Control equipment / Enclosures | Ch. 11 | Clause 11 | High |
| Motors and drives | Ch. 12 | Clause 12 | High |
| Wiring / Conductors | Ch. 14 | Clause 12 | Medium |
| Marking and documentation | Ch. 19 | Clause 17 | High |
| Verification and testing | Ch. 20 | Clause 15 | High |
**Key difference — wire colors:**
| Conductor | NFPA 79 | IEC 60204-1 |
|-----------|---------|-------------|
| Protective Earth | Green or bare | Yellow-green (required) |
| Neutral | White or gray | Blue |
| Phase conductors | Black, red, blue | Brown, black, gray |
## US Electrical Standards: UL 508A / NEC / NFPA 79
These three standards form the US electrical compliance stack. They overlap but have distinct scopes.
[View full crosswalk →](../ul508a-nec-nfpa79/)
| Standard | Primary Scope | When It Applies |
|----------|---------------|-----------------|
| NEC (NFPA 70) | Electrical wiring in buildings | Always — governs supply wiring to the panel |
| NFPA 79 | Electrical equipment on industrial machinery | Machinery with motors, actuators, control circuits |
| UL 508A | Industrial control panel construction | When UL listing is required (most US installations) |
| Topic | NEC | NFPA 79 | UL 508A |
|-------|-----|---------|---------|
| Scope | Premises wiring | Machine electrical equipment | Control panel construction |
| Branch circuit protection | Governs | References NEC | References both |
| Wire sizing | NEC tables | Follows NEC inside enclosure | Follows NEC |
| Grounding | Art. 250 | Ch. 8 references NEC | Follows NFPA 79 / NEC |
| E-stop / Safety | Not covered | Ch. 9 | Not covered |
| Listing / Marking | Not a listing std | Not a listing std | UL listing mark |
| Panel enclosure | Not covered | Ch. 11 | Detailed requirements |
Trust Boundary — Engineering Judgment Required
This site is an independent educational reference for industrial automation standards.
It paraphrases and organizes guidance in original language; it is not a substitute for the official
published standards, professional engineering judgment, or legal review, and content has not been
independently verified against current published editions.
Items marked Review pending await technical review against the identified edition.
Items marked Planned have no reviewed source material behind them.
Do not rely on this site for compliance determinations, safety-critical design decisions, or legal interpretation.