Electrical Industry Canada: Arc Flash, Shock Hazard, & Fire Safety - 18

Can we clarify receptacles in built in millwork for non-appliance
use? Built in Ikea cabinet floor lighting power?
Rule 26-720 h) does not permit receptacles to be installed in
cupboards, cabinets, or similar enclosures except in the following
cases:
*The receptacle is part of a factory built enclosure. This would
require a certification marking to be present on the overall product.
*The receptacle is provided for use with an appliance suitable for
installation within the enclosure. Cord connected dishwashers, in
line water heaters, garbage disposal units and similar appliances are
considered suitable.
*The receptacle is for a microwave oven, a cord connected range
hood or a connected combination microwave oven/range hood
fan.
Brown added that, " if there's wiring on a machine, typically that machine
is covered by an overall approval, and it would be under the product
standard and not the wiring inspector that's looking at it. "
Question regarding reduced neutral wires on the main
service and what benefit it serves to contractors or customers?
*The
receptacle is de-energized unless the enclosure door is in the
fully open position.
*A receptacle installed for in-cabinet or under cabinet lighting
power supplies must be installed outside the enclosure - alternatively,
it is permitted to remove cord caps for this type of equipment
and hard wire to a junction box located within the cabinet space.
When do unarmoured cables used for 24VDC devices (sensors,
safety switches, etc.) on machines require mechanical protection?
Protection
requirements vary depending on the limitation of the power
supply and the function the wiring is performing:
*Section 12 for general wiring not meeting the power limitations of
Section 16.
*Section 16 for class 1 and 2 circuits.
Class 1 conductors are required to be installed in accordance with all
other appropriate Sections and Class 1 remote control circuits are
specifically required to be protected where mechanical damage to the
circuit could result in a hazardous situation as per Rule 16-116.
Conductors to Class 2 circuits in accordance with Section 16 have no
specific requirements for mechanical protection unless they form part of
an installation that provides safety control, or they are located in a
hazardous location.
ELECTRICAL INDUS TRY CANADA
4-018 requires that a neutral shall have sufficient ampacity to carry
the unbalanced load and the maximum unbalanced load shall be
calculated as determined by Section 8. When installing electric
discharge lighting or non-linear loads supplied from a three-phased
4 wire system, the neutral shall not be reduced. Some examples of
non-linear loads are loads that include dimmers, computers, microprocessors,
and most other electronic loads.
When a system such as a dwelling has been designed and installed
with balanced loads, the neutral conductor will only have the unbalanced
load carried on the conductor, there will be little current on
the neutral. For solidly grounded systems the grounded conductor
of the AC system shall not be smaller than the bonding conductor.
The main benefit to installers and customers for a reduced neutral is
that there is a cost savings. See Bulletin 4-3-9.
VOLUME 1, ISSUE 6
18
Electrical Industry Canada: Arc Flash, Shock Hazard, & Fire Safety

Table of Contents for the Digital Edition of Electrical Industry Canada: Arc Flash, Shock Hazard, & Fire Safety
