Quick Hits

🗓️, 2026
⚡ SPARKY BREAKDOWN — NEC 225 SERIES (PART 6)

SUPPLY RULES (225.30)
joshthesparky4 · Josh The Sparky

OPENING HOOK
This rule tricks everyone. ⚠️
It sounds simple… until the exceptions hit.

CORE IDEA
Each building or structure is generally limited to ONE supply source.
This keeps systems safer, simpler, and easier to disconnect.

CODE CONNECTION
225.30 — Number of Supplies
• One supply per building/structure

Key Exceptions Include:
• Emergency systems
• Fire pumps
• Different voltages/frequencies/uses
• Large capacity loads

MEMORY TRICK
“1 building = 1 supply… unless reliability is needed.”

FINAL TAKEAWAY
If you see multiple supplies…
You should immediately be thinking of an exception. ⚡

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#NEC #Article225 #ElectricianLife #CodeStudy #ElectricalSafety