Section 24 Bonding Rules
4-036 Colour of Conductors
(1) Insulated grounding or bonding conductors shall:
(a) Have a continuous outer finish that is either green or green with one or more yellow stripes; or
(b) If larger than No. 2 AWG, be permitted to be suitably labelled or marked in a permanent manner with a
green colour or green with one or more yellow stripes at each end and at each point where the conductor is
accessible.
(2) Conductors coloured or marked in accordance with Subrule (1) shall only be used as grounding or bonding
conductors.
BOND CONDUCTOR MUST BE GREEN
10-614 Bonding Jumpers
(1) Bonding jumpers shall be:
(a) Of copper or other corrosion-resistant material: and
(b) Of sufficient size to have an ampacity not less than that required for the corresponding bonding conductor except
that
for service raceways this ampacity shall be permitted to be determined on the basis of:
(i) Table 41, where the conducting path is supplemented by:
(A) The use of two locknuts and a grounding bushing; or
(B) The use of a conduit or cable connector with a built-in shoulder complete with one locknut and grounding
bushing: or
(ii) The maximum size that the terminal on the grounding bushing will accommodate where single-conductor metal
sheathed cables are employed and the sheaths are attached to a grounded metal plate by connectors, each fitted with
a
locknut and a grounding bushing; and
(c) Attached to cabinets and similar equipment in a manner specified in Rule 10-906; and
(d) Attached in a manner specified in Rule 10-908 where used between grounding electrodes or around water meters
and the
like.
(2) Straps, when used for bonding non-current-carrying metal parts, shall be not less than 19 mm in width and not less
than 1.4 mm
in thickness if of steel or not less than 1.2 mm in thickness if of aluminum or copper.
BOND CONDUCTOR MUST BE COPPER
10-808 Installation of Equipment Bonding Conductors
(1) The bonding conductor for equipment shall be permitted to be spliced or tapped, but such splices or taps shall be
made only within boxes, except that in the case of open wiring where they shall be permitted to be made externally
from boxes and shall be covered with insulation.
(2) Where more than one bonding conductor enters a box, all such conductors shall be in good electrical contact with
each other by means of securing all bonding conductors under bonding screws, or by connecting them together with a
solderless connector and connecting one conductor only to the box by a bonding screw or a bonding device, and the
arrangement shall be such that the
disconnection or removal of a receptacle, fixture, or other device fed from the box will not interfere with, or interrupt,
the bonding continuity.
(3) Where a bonding conductor is run in the same raceway with other conductors of the system to which it is
connected, it shall be insulated, except that where the length of the raceway does not exceed 15 m and does not
contain more than the equivalent of 2 quarter bends, an uninsulated bond conductor shall be permitted to be used.
(4) Where a metal raceway or steel pipe is used as a bonding conductor, the installation shall comply with Section 12.
(5) A copper bonding conductor shall:
(a) if No. 6 AWG or larger, and attached securely to the surface on which it is carried, be protected
where exposed to mechanical injury; and
(b) if smaller than. No. 6 AWG, or if the installation does not come within the provisions of Paragraph (a) of this
Subrule, be installed and protected in the same manner as the circuit conductor for a given
installation.
MUST BE INSTALLED AND PROTECTED SAME ASCIRCUIT CONDUCTORS.
MINIMUM #12 or C IRCUIT CONDUCTOR SIZE
This is the rule which we are enforcing. As per 24-104 (6a) code rules, the minimum size bond must be #12. You can run
a cable assembly which incorporates a #12 insulated green bonding conductor as in a manufactured BX cable for this
purpose. You may install a #10 NMD cable which provides the #12 bond also isolating the bond from contact with other
metallic surfaces. In this instance, if you did install a smaller bond than #6 insulated as allowed under rule 10-808(5b),
you will be required to install and protect the conductor in the same manner as the circuit conductors i.e. in the same
sheathing, NM conduit etc.
Since you are NOT installing this bond in the same manner as the circuit conductors, it must comply with rule 10-808(5a)
∆10-814 Bonding conductor size (see Appendix B)
(1) The size of a bonding conductor shall be not less than that given in Table 16, but in no case does it
need to be larger than the largest ungrounded conductor in the circuit. (Rule 24-104 supersedes this rule by stating a
minimum size of #12 for patient care areas.)
(2) Where circuit conductors are paralleled in separate cables or raceways, the bonding conductor shall be permitted to
be paralleled and the size of bonding conductor in each parallel run shall not be less than that specified in Table 16
based on the size of the circuit conductors contained in the raceway or cable. Notwithstanding the requirements of Rule
12-108, the size of the bonding conductor in each parallel run shall be permitted to be smaller than No. 1 /0
24-104 Bonding to Ground in Basic Care Areas (see Appendix B)
(1) Bonding conductors shall be insulated unless they are:
(a) Installed in nonmetallic conduit; or
(b) Incorporated into a cable assembly in such a manner that contact between any metal shield or armour, if it is
present, and a bare bonding conductor is not possible.
(2) All receptacles and other permanently connected equipment shah be bonded to ground by copper equipment
bonding conductors, sized not smaller than the minimum size required for circuit conductors, and run in
accordance with Rule 10-808, or run with the circuit conductors in accordance with the following:
(a) Each multi-wire branch circuit shall be provided with its own equipment bonding conductor; or
(b) Except as permitted by Paragraphs (c) and (d), each 2-wire branch circuit supplying a receptacle in a
patient care environment shall be provided with its own equipment bonding conductor; or
(c) When the receptacles in a patient care environment are supplied from two 2-wire branch circuits in the
same raceway, a single equipment bonding conductor shall, be permitted to be shared by the two circuits; or
(d) When receptacles intended for a pair of adjacent patient care environments are supplied by three 2-wire
branch circuits and one of the circuits is intended to be shared by both patient care environments, the three
circuits shall be permitted to share two equipment bonding conductors.
(7) Where a separate bonding conductor is required by this Code to supplement the bonding afforded by a metal
raceway, it shall be installed in the same raceway as the circuit conductors.
(8) Where a separate bonding conductor, required by this Code, is run with single conductor cables, the bonding
conductor shall follow the same route as the cables.
12-504 Use of non-metallic-sheathed cable (see Appendix B)
Non-metallic-sheathed cable shall be permitted in or on buildings of combustible construction and in or on other types of
construction where acceptable.
12-516 Protection for cable in concealed installations (see Appendix G)
(1) Where the cable is run through studs, joists, or similar members, the outer surfaces of the cable shall be kept distant
at least 32 mm from the edges of the members or the cable shall be effectively protected from mechanical injury.
(2) Where the cable is run through or along metal studs, joists, sheathing, or cladding, it shall be
(a) located so as to be effectively protected from mechanical injury both during and after installation;
(b) protected where it passes through a member by an insert approved for the purpose and adequately
secured in place.
(3) Where the cable is installed immediately behind a baseboard, it shall be effectively protected from mechanical
injury from driven nails.
Section 24
Bonding Option—Using @10 Loomex w/#12 Bond
#10 Loomex with #12
bond bare copper
To others
Junction box in ceiling
(Accessible)
Box
#10 Loomex with Bare #12 Bond Conductor
#12 bare copper
Box
#12 bare copper
Continue to
next box
Section 24
Bonding Option—Using Armored Cable with Insulated #12 Bonding Conductor
#Armored Cable with
insulated green #12
bonding conductor
To others
Junction box in ceiling
(Accessible)
Box
#12 bare or insulated copper
Box
#12 bare or insulated copper
Continue to
next box
Section 24
Bonding Option—Routing # 6 Insulated Bond Conductors
#6 Insulated
Green back to
panel
#6 insulated Green
Bond routed with
circuit conductors
To others
Junction box in ceiling
(Accessible)
Box
Hi-press or
c-tap
#12 bare copper
Box
Hi-Press tap
#12 bare copper
#6 insulated
Continue to
next box
Section 24
Bonding Option—Routing #12 Insulated Green through ENT
#6 Insulated
Green back to
panel
ENT Raceway
Include #12 Insulated bond conductor in ENT with
circuit conductors See rule 10-808(3)
To others
Junction box in ceiling
(Accessible)
Box
#12 bare copper
10-808(2)
Box
#12 bare copper
Continue to
next box