BC Class B-R Electrical FSR flashcards

32 cards. Read the term and the definition here. The deck at the top of this page is optional.

Class B-R FSR

A certified field safety representative authorized to take out permits and supervise regulated electrical work for a licensed contractor, within the class and scope stated on the certificate.

Permit before work

Regulated electrical work may not begin until a permit is issued, and the FSR named on that permit is accountable for all work performed under it.

Single-phase current formula

Current equals power divided by the product of voltage and power factor: I = P / (V × PF). Use for resistive and single-phase motor or appliance load calculations.

Three-phase power formula

Power equals the square root of three times voltage times current times power factor: P = √3 × V × I × PF. Rearrange to solve for current when sizing conductors.

Voltage drop single-phase

Approximate drop equals two times resistivity times current times length divided by circular mils; the factor two accounts for the outgoing and return conductor path.

Voltage drop three-phase

Approximate drop equals the square root of three times resistivity times current times length divided by circular mils; the return path is not counted separately.

Bonding versus grounding

Bonding connects non-current-carrying metal parts to provide a fault current path; grounding connects the electrical system to earth. Both are required and serve distinct functions.

Continuous load factor

A load expected to operate three hours or more is continuous and is calculated at 125 percent of its rating for conductor and overcurrent sizing.

Termination temperature limit

Conductor ampacity is limited by the temperature rating of the terminations; where terminations are rated lower than the conductor, the lower column governs the final ampacity.

Box fill counting

Each conductor counts once, each device counts as two conductors per strap, grounding conductors count once, and the largest conductor sets the base volume allowance.

Conduit fill percentages

Permitted conductor area is 53 percent of conduit interior area for one conductor, 31 percent for two, and 40 percent for three or more conductors.

Motor branch conductor sizing

Branch-circuit conductors supplying a single motor are sized at not less than 125 percent of the motor full-load current rating from the applicable table.

Motor overload protection

Overload devices protect the motor from sustained excess current and are selected based on the motor's service factor or temperature rise, separate from short-circuit protection.

Transformer primary-only protection

Primary-only protection is allowed only within specified rating limits relative to the transformer; outside those limits both primary and secondary protection are required.

Working space clearance

A defined depth, width, and height of clear space must be maintained in front of electrical equipment to permit safe operation and maintenance without contacting live parts.

Lockout tagout default

Electrical work is performed de-energized with locks and tags applied by default; energized work requires documented justification, hazard assessment, and authorization.

Concealed work notice

The FSR must request inspection before covering concealed wiring, boxes, or raceways so the safety authority can verify compliance while the work is still visible.

Incident reporting duty

Electrical contact, arc flash, or fire events must be reported to the safety authority within the regulated timeframe, with the scene preserved for investigation.

Arc flash hazard label

Equipment likely to be examined while energized must carry a label identifying arc flash and shock hazards, with incident energy or PPE category information.

Service demand calculation

Sum connected loads, apply permitted demand factors for lighting, ranges, and dryers, then size service conductors and equipment to the resulting calculated demand.

Grounding electrode supplement

Where a single grounding electrode such as a rod exceeds the specified resistance, a supplemental electrode is required and must be bonded to the first.

GFCI protection purpose

Ground-fault circuit interrupter protection limits fault current to a low level to reduce shock hazard, and is required in specified wet or high-risk locations.

AFCI protection purpose

Arc-fault circuit interrupter protection detects characteristic arcing signatures and opens the circuit, reducing fire risk on specified branch circuits.

Overcurrent device coordination

The overcurrent device rating must not exceed the conductor ampacity after adjustment and correction factors, and must carry the calculated load continuously.

Ambient temperature correction

Conductor ampacity is corrected for ambient temperature using table factors, because higher ambient reduces the heat a conductor can dissipate safely.

Conductor bundling adjustment

Where multiple current-carrying conductors share a raceway or cable without spacing, ampacity is reduced by adjustment factors based on conductor count.

Hazardous location classification

Class and division or zone designations define the flammable hazard present, and the classification determines permitted wiring methods, enclosures, and sealing requirements.

Wet location wiring

Wet and damp locations require wiring methods and enclosures rated for moisture exposure, with listed fittings and drain provisions where water can enter.

FSR delegation limits

An FSR may delegate supervision only to another qualified FSR within the same class of work, and the delegation must be documented and accepted.

Compliance order authority

The safety authority may issue compliance orders requiring correction of unsafe or non-compliant work, and failure to comply can lead to certificate suspension or cancellation.

Record retention duty

Permits, inspection records, test results, and as-built drawings must be retained and produced on request during an inspection or investigation.

Neutral conductor sizing

The neutral must carry the maximum unbalanced load and may be reduced only where the code permits, such as for service calculations with restricted harmonic content.