BC Class B-R Electrical FSR cheat sheet

Class B-R FSR scope: qualified to take out permits and supervise regulated electrical work on behalf of a licensed electrical contractor, limited to the class and voltage/installations named on the certificate of qualification.

Permit obligation: regulated work requires a permit before work starts; the FSR named on the permit is accountable for the work performed under it, including work by others on site.

BC Electrical Code is adopted by regulation and tracks the Canadian Electrical Code with BC amendments; the edition in force governs, not the edition at time of design.

Core formula: I = P / (V × PF) for single-phase loads; three-phase P = √3 × V × I × PF, so I = P / (√3 × V × PF).

Voltage drop (single-phase) ≈ (2 × K × I × L) / CM, where K is resistivity (≈12.9 for copper, ≈21.2 for aluminum), L in feet, CM circular mils; three-phase uses √3 instead of 2.

Conductor ampacity must be coordinated: continuous loads at 125%, overcurrent device sized to protect the conductor, and termination temperature limits cap the usable ampacity column.

Bonding is not grounding: bonding connects non-current-carrying metal to the system to clear faults; grounding connects the system to earth. Both are required and serve different purposes.

GFCI and AFCI protection requirements are location- and circuit-specific; verify the current rule for kitchens, bathrooms, outdoors, and bedrooms rather than relying on memory.

FSR duties include ensuring work complies with the code and the Safety Standards Act, maintaining records, and notifying the safety authority at required stages (e.g., before covering concealed work).

A field safety representative may be required to be reachable and able to attend; delegation to another qualified FSR must be documented and within the same class of work.

Lockout and energized-work rules: work is de-energized and locked out by default; energized work requires justification, hazard assessment, PPE, and authorization under the safety standards.

Incident reporting: electrical contact, arc flash, or fire events must be reported to the safety authority within the timeframes set by regulation, and the scene preserved as required.

Clearance and working-space rules protect access to live parts; the required depth, width, and height in front of equipment is a code rule, not a preference.

Labeling: arc flash and shock hazard labels, disconnect identification, and panel directories are compliance items subject to inspection.

Enforcement ladder typically runs from advisory to compliance order to discipline or certificate action; the FSR is the accountable party for the contractor's regulated work.

Recordkeeping: permits, inspection results, test records, and drawings must be retained and produced on request by the safety authority.

Box fill: count each conductor once, each device twice (per strap/yoke), each equipment grounding conductor once, and apply the largest-conductor volume allowance plus per-conductor allowances from the table.

Conduit fill: 1 conductor ≤53% of interior area, 2 conductors ≤31%, 3 or more ≤40%; compare total conductor area to the permitted percentage of conduit internal area.

Motor branch circuit: overload protection sized to the motor's service factor and temperature rise, short-circuit/ground-fault protection from the code table, and conductors at 125% of motor full-load current for branch circuits.

Transformer protection: primary-only protection is permitted within limits; otherwise primary and secondary protection are both required, with ratings from the applicable table and next-size-up rules.

Demand factors reduce calculated load for dwellings (e.g., range and dryer demand factors, general lighting demand) but never reduce the ampacity of the service conductors below the calculated demand.

Receptacle and lighting load calculations use unit loads per area or per outlet; the service calculation sums connected loads, applies demand factors, then sizes service and feeder conductors.

Grounding electrode system: metal water pipe, ground rods, concrete-encased electrode, and plate electrodes are bonded together; a single electrode must be supplemented when it exceeds the specified resistance.

Hazardous locations and wet/damp locations change enclosure, sealing, and wiring-method requirements; classification drives the permitted method, not convenience.