Aviation Battery & Electrical System Markings
CARs Part V — Electrical System Placards · Federal — Canada
§The Law
CARs Part V — s.571 + CAR 625 — CARs Part V — Electrical System Placards
“Aircraft battery compartments and electrical panels should be placarded with voltage, ampere-hour rating, battery type, and safety cautions as required by the aircraft type certificate and maintenance manual.”
View official regulation text✓Plain English
Aircraft batteries — typically 24V lead-acid or Ni-Cd — need labels showing voltage, capacity, type, and explosion/acid hazard warnings. Electrical panel buses need fuse/breaker ID labels so maintainers can isolate faults.
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Specific Requirements
Battery: voltage (12V/24V), amp-hour rating, chemistry
"CAUTION — EXPLOSIVE GAS" on lead-acid battery compartments
Battery type label matches approved equipment list
Circuit breaker/fuse panels: bus identification labels
Main bus, avionics bus, essential bus clearly marked
Lithium battery placards per Transport Canada special conditions
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📚Sources & Authority
Every claim on this page is backed by official government legislation and verified industry sources. Last verified: March 2026.
🏛 Official Government Sources
Canadian Aviation Regulations (CARs) Part II
Justice Laws Canada · March 2026
CARs Part II covers aircraft identification and marking requirements including registration marks, sizing, and placement for Canadian-registered aircraft.
Transport Canada — Aircraft Registration
Transport Canada · March 2026
Official aircraft registration portal. Covers how to register, marking requirements, and the C- prefix system for Canadian aircraft.
RPAS (Drone) Registration — Transport Canada
Transport Canada · March 2026
Drone registration requirements for RPAS between 250g and 25kg. Registration number should be marked on the drone and visible at all times.
All sources are official government publications or recognized industry authorities. Links verified March 2026. If you find a broken link, let us know.
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Shop Aviation Electrical LabelsOr call (289) 228-7021Regulation Quick Facts
- Regulation
- CARs Part V — s.571 + CAR 625
- Jurisdiction
- 🇨🇦 Federal — Canada
- Category
- Aviation Law
Source library
Confirm the current rule before relying on a marking
Our guides are a starting point for locating government sources connected to CARs Part V — s.571 + CAR 625 markings. Requirements can depend on jurisdiction, vehicle or site details, and the date you act.
- Open the linked official source and check its current version.
- Confirm the rule applies to your exact vehicle, vessel, property, or operation.
- Verify wording, dimensions, placement, and effective dates before ordering.
Compliance Certificate
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