Wiring and Protection Flashcards
PEC Chapter 2
Grounded Conductors
What insulation rating is required for grounded conductors over 1000V?
Must be rated not less than 600V.
Branch Circuits
How are ungrounded DC conductors identified for sizes 14 sqmm or less?
- continuous red/black outer finish
- red/black stripes
- markings like “POS/NEG” every 610mm
Grounded Conductors
how can a grounded conductor be identified?
- By a continuous white or gray outer finish or,
- three continuous white or gray stripes on other than green insulation.
Branch Circuits
In what areas is GFCI protection required in dwelling units? (Give at least three).
- Bathrooms
- garages
- outdoors
- crawl spaces
- kitchens
- sinks
- boathouses
- bathtubs/showers
- laundry areas.
Branch Circuits
What is the “1800 rule” in outlet spacing?
Receptacles should be installed within 1800mm of appliances and spaced no more than 1800mm apart along walls.
Branch Circuits
What is the requirement for 20A branch circuits in dwellings?
Must be provided for small appliances, laundry, bathroom, and garage outlets—with no other outlets allowed on those circuits.
Branch Circuits
Where should bathroom receptacles be located?
Within 900mm of the basin and not more than 300mm below it.
Branch Circuits
What is the max height for outdoor receptacles above grade?
2000mm
Branch Circuits
What is the outlet requirement for hallways 3000mm or more in length?
At least one receptacle outlet must be installed
Outside Branch Circuits
What is the required vertical clearance for overhead conductors above pedestrian areas (≤150V)?
3000mm
Outside Branch Circuits
What is the clearance for overhead conductors over public streets and areas with truck traffic?
5500mm
Outside Branch Circuits
What vertical clearance is required for conductors above roof surfaces?
at least 2700mm
Outside Branch Circuits
What is the minimum horizontal clearance from buildings for conductors?
900mm in all directions
Overcurrent Protection
When can a conductor be protected by the next higher standard OCPD?
When ≤800A, not feeding multiple portable loads, and no matching breaker size exists.
Overcurrent Protection
What is the max OCPD rating for 1.25 mm² copper wire?
10A (continuous load ≤8A)
Overcurrent Protection
What must every ungrounded conductor have?
A fuse or breaker in series
Overcurrent Protection
Where must OCPDs be located?
At the point where ungrounded conductors receive their supply
Overcurrent Protection
What are the mounting requirements for overcurrent protection devices?
Must be in enclosures or on panels in dry, fire-safe rooms for qualified personnel; mounted vertically unless impractical
Overcurrent Protection
What is required for circuit breaker markings?
mp rating, interrupting rating, and voltage rating—visible and durable
Grounding and Bonding
What are the two types of grounding in PEC Chapter 2?
System grounding and equipment grounding
Grounding and Bonding
When must a system be grounded?
If voltage-to-ground is ≤150V or if it supplies buildings and voltage-to-ground is >150V but <1000V
Grounding and Bonding
What bonding method is NOT permitted?
Soldering
Grounding and Bonding
How many grounding electrode systems should a structure have?
Only one per structure/building
Grounding and Bonding
What must be bonded to the grounding system?
All non-current-carrying conductive parts that may become energized during a fault
