Wiring for Armored Cable (A/C)

Question 1

Armored Cable (A/C) can be used for both ____ and ____ wiring systems

Answer 1

open, concealed

Question 2

Armored Cable - Can run on surface of _____ and ____ in buildings of masonry construction

Answer 2

walls, ceilings

Question 3

Armored Cable - can quickly distribute power throughout new industrial plants, adding existing plants, and relocating machinery

Question 4

Armored Cable - can also be used in _____ and ____ buildings

Answer 4

public, comericial

Question 5

Armored Cable - can be installed in long continuous runs without need for joints and splices

True or False

Answer 5

True

Question 6

Conduit systems however - require a box or fitting after each ____ of conduit and/or after an accumulation of ___ degrees of bend to ease the pulling in of the conductors. - for Armored Cable

Answer 6

30 m, 360 degree

Question 7

Electrical rating

Armored Cable - has a continuous protective metal covering

allows for use on circuits up to ____ maximum

available in 1,2,3, and 4 conductor combinations, ranging in size from No. 14 to No. 4/0

Answer 7

600 V

Question 8

Individual conductors in the cable used to be covered in a cotton-braid-over-rubber which rated for use at a maximum temperature of (___) degrees

Answer 8

60 degrees

Question 9

Modern Armored Cable are insulated with a durable material called _____

maximum temperature rating of (___) degrees

Answer 9

Cross-Link (X-Link)

90 degrees

Question 10

Trade Names

Armored Cable was originally known as _____

because a small, (anti-short bushing) was inserted in the end of each cable termination

-usually refer A/C as BX or BXL

BXL has an (internal lead sheath) over the conductors

Answer 10

(armored bushed cable) (ABC)

Question 11

Cable construction

____ has a lead sheath placed between conductors and the armour

prevents _____ or ____ from entering the conductor portion of the cable suitable for outdoor use or direct burial in the earth

aluminum amour on most A/C corrodes severely when placed underground

that’s why steel is used instead for outdoor and underground use (ACL)

Answer 11

ACL

moisture, chemicals

Question 12

Cable termination

Older style 3 conductor flexible armoured cable
-_____ and aluminum armour

Modern flexible armoured cable
-____ and aluminum armour

ACL flexible armoured cable
-____ and _____ armour and lead

Answer 12

stranded

solid

solid, galvanized steel

Question 13

Procedure for terminating armoured cable in box

Step 1 - cut through ___ wraps of armour at 45 degree angle

Step 2 - rotate armour and remove from cable

Step 3 - insert ____ between armour and conductors
- remove paper wrapping
-place grounding strip
-attach anti-short bushing

Step 4 - tighten connector on cable. Install connector to box
-secure grounding strip under connector clamp
-tighten locknut (screw driver and wrench)
-anti-short bushing (can be seen here)
-box

Answer 13

2, bushing

Question 14

Old style armoured cable secured to box by built-in clamp

outlet box
ground screws
15 cm free conductor
anti-short bushing
ground strip
cable clamp
switch mounting lug
armoured cable
cable strap within 30 cm of box

Question 15

Terminating armoured cable in box Procedure

Use ____ to remove correct amount of armour

Trim the paper wrapping around the conductors as close to the armour as possible

Fold ____ so that it is out of the way beside the cable

Then insert a ___ or plastic (anti-short bushing) - (prevents the jagged edges of the armour from cutting into the insulation around the conductors

And then insert cable in an approved box connector (secure anti-short bushing in place) and also clamps onto the ground strip

Cable now have a grounding conductor instead of aluminum grounding strip (eliminates the need for folding back and clamping a grounding strip)

Answer 15

hacksaw. aluminum grounding strip, fibre

Question 16

Cable supports

just like NMSC - Armored Cable must be supported by an approved strap or staple (within ___ of every box)

maximum ____ between the supports on the cable run allowed

if run through wooden joists - must be kept back at least ___ from the face (prevent steel nails driven in wooden members from puncturing aluminum armour

Steel plate located in front of cable when closer than 3 cm

Answer 16

30 cm, 1.4 m, 3 cm

Question 17

Fishing amoured cable

____ - lowering the cable down inside the wall from a hole in the attic or ceiling (false ceilings)

especially used in shopping, industrial, and commercial malls

lighting and power circuits can run through these (“open”) spaces above false ceilings

make sure avoid obstacles

Answer 17

fishing

Question 18

ACL for Wet areas

ACL or BCL - Armored Cable equipped with ____ sheath

used for outdoor lights, signs, and related equipment

also pumps, garden lighting, post lights, and supply lines between buildings

requires _____ must be used to secure this cable to a box or fitting in a wet area

can be buried in masonry or concrete where excessive moisture is present (cause moisture-proof) (garden receptacle installation)

Answer 18

lead, water-tight connectors

Question 19

ACL does not have a grounding strip

relies on secure mechanical connection to the box for its ground

soft lead sheath is allowed to extend past the connector and in to the box

eliminates need for an anti-short bushing

Question 20

Armored cable accessories

A/C can be bent only so far before interlocking armour separates (not approved)

requires special connectors providing 45 degree and 90 degree angles at sharper angle than cable will allow must be made

______ - allow pair of cables to enter one knockout in a box

Straps and/or staples of the proper size (made similar to NMSC) made for supporting armoured cable

Answer 20

Duplex connectors

Question 21

For Review

1. Why is A/C suitable for both concealed and open wiring systems? ____
2. Why does A/C have a higher voltage rating than NMSC? _____
3. List the A/C conductor combinations?
   _____ (No. 14 to No. 4/0)
4. Explain in your own words the procedure for terminating A/C at a box?
   ____
5. What care must be taken when fishing A/C?
   Avoid out sheath damage by obstacle
6. How does A/C for wet locations differ from A/C used in dry locations?
   Has _____ to prevent moisture and chemicals from entering conductors. (Can be used outdoor or underground burial)
7. How is moisture prevented from entering the box or fitting in an outdoor cable installation?
   ____
8. How is the ground circuit maintained in A/C installations?
   _____ (to the box for its ground). And also soft lead sheath is allowed to extend past the connector and in the box (eliminates need for anti-short bushing)
9. Why must care be taken when bending A/C?
   Used _____ or Duplex (for two cables at a time)
10. What devices are used for terminating armoured cable where a sharp bend must be made?
    (_____ - 45 degree and 90 degree) and Duplex (for two cables at a time)

Answer 21

Armor

Continuous protective metal

1,2,3, and 4

Strip off armour (using hacksaw at 45 degree angle) and trim paper as much as you can. Then fold aluminum ground strip out of way. So that you now have room to attach anti-short bushing and insert cable into box connector.

internal lead sheath

Water tight connectors

Secure mechanical connection

staples (straps)

special conductors

Question 22

Rules 12-602 to 12-618 apply only to armoured cable installations

Question 23

12-602 - armoured cable can be installed in or on buildings or portions of buildings of either combustible or non- combustible construction

True or False

Under table 19 (suitable for burial if):

-underground runs
-circuits in masonry or concrete (if encased or embedded in at least ___ of the masonry or concrete)
-in locations where exposed to weather, continuous moisture, excessive humidity, or to oil or other deteriorating effect on installation

If armoured cable made wholly or ___ shall then not embedded in concrete containing reinforcing steel unless:

concrete contain no chlorides addtivies
armour treated with _____ or other means (prevent galvanic corrosion of aluminum)

if armoured cable laid in or under cinders or cinder concrete - must be protected from corrosive action by a (____) of non cinder concrete at least 25 mm thick entirely surrounding them unless they are 450 mm or more under the cinders or cinder concrete

In buildings of ____ construction armours (not larger than No. 10) for conductors copper or aluminum are permitted to laid on face of masonry or other material of which walls and ceiling are constructed and shall be permitted to be buried in the plaster finish for extensions from existing outlets

Armoured cable with overall jacket shall be permitted for use in a raceway when it is installed in accordance with Rule 12-902 (2)

Answer 23

50 mm

alumiunum

bituminous base of paint

gouting

non-combustible

Question 24

12-604 Protection for armoured cable in lanes

if subject to mechanical damage and unless otherwise protected, (steel guards) of not less than No. 10 MSG, adequately secured, shall be installed to protect armoured cables less than 2 m above grade in lanes and driveways

True or False

Question 25

12-606 Use of thermoplastic-covered armoured cable

armoured cable of this type listed in Table 19 (probably ACWU) suitable for direct burial in the earth and has a thermoplastic outer covering can only be used when the outer covering will not be subject to mechanical damage

True or False

Question 26

12-608 Continuity of armoured cable

armoured cable should be in a manner that the mechanical and electrical ____ of the armour is (maintained) throughout the run, and the armour of cables should be mechanically and electricallly (secured) to all equipment to which it is attached

Answer 26

continuity

Question 27

12-610 Terminating amoured cable

1) Where conductors issue from armour, they shall be protected from abrasion by:

a) an ____ or equivalent protection installed between the conductors and the armour; or

b) the ____ of an armoured cable, provided that the inner jacket is left protruding a minimum of (5 mm) beyond the armour.

2) Where conductors are (No. 8 AWG) or larger, copper or aluminum, such protection shall consist of

a) _____, unless the equipment is equiped with a (hub) having a smoothly rounded throat; or

b) ____ fastened securely in place that will separate the conductors from the armoured cable fittings and afford adequate resistance to mechanical damage.

3) Where armoured cable is fastened to equipment, the connector or clamp shall be of such design as to leave the insulating bushing or its equivalent (____) for inspection.

4) Where conductors connected to (open wiring) issue from the ends of armouring, they shall be protected with boxes or with fittings having a separately bushed hole for each conductor.

True or False

Answer 27

insulating bushing

inner jacket

insulated-type bushing

insulating material

visible

True

Question 28

12-612 Proximity to knob-and-tube and non-metallic-sheathed cable systems

Where is armoured cable is used in a building in which concealed knob-and-tube wiring or concealed nonmetallic-sheathed cable wiring or concealed nonmetallic-sheathed cable wiring is installed, the cable shall not be ____ if there is possibility of damage to the existing wiring.

Answer 28

fished

Question 29

12-614 Radii of bends in armoured cables

1) Where armoured cables are bent during installatioin, the radius of the curve of the (inner edge) of the bends shall be at least ___ times the external diameter of the armoured cable.

2) Bends shall be made without undue distortion of the armoured and without damage to its inner or outer surfaces.

3) Where armoured cables are installed as described in Rule 12-602 6), the minimum bending radii measured at the innermost surface of the conduit or tubing shall be not less than

a) 10.5 times the diameter of the cable for (low voltage) cable;
b) 18 times the diameter of the cable for (high-voltage) cable; or
c) those specified by the cable manufacturer.

Answer 29

6 times

Question 30

12-618 Running of cable between boxes, etc.

Armoured cable shall be supported between boxes and fittings in accordance with CEC Rule 12-510.

Question 30

12-616 Concealed armoured cable installation

1) Where armoured cable is run through studs, joists, or other members, it shall be

a) located so that its outer circumference is at least ____ from the nearest edge of the members; or
b) protected from mechanical damage where it passes through the holes in the members.

2) Where armoured cable is installed immediately behind baseboards, it shall be protected from mechanical damage from driven nails.

Answer 30

32 mm

Question 31

12-510 Running of cable between boxes and fittings

1) Where the cable is run between boxes and fittings, it shall be supported by ____, Type 2S or 21S cable ties, or other devices located

a) withing (300 mm) of every box or fitting; and
b) at intervals of not more than (1.5 m) throughout the run.

2) Cables run through hole in joists or studs shall considered to supported.

3) Notwithstanding Subrules 1) and 2), where the cable is run as (concealed wiring) such that it is impracticable to support it, and where metal sheeting or cladding, metal joists, metal top or bottom plates, or metal studs are not used, the cable shall be permitted to be (fished) and need not be supported between boxes and fttings.

4) Notwithstanding Subrule 1) a), where cable is run to a switch or a receptable with an integral enclosure incorporating an integral cable clamp, the cable shall be supported by straps, Type 2S or 21S cable ties, or other devices located within 300 mm of the switch or receptacle wall opening, and there shall be at least a 300 mm loop of unbroken cable or 150 mm of a cable end available on the interior side of the finished wall to permit replacement.

Answer 31

straps

Question 32

4-030 Use of Identified Conductors

1) An identified conductor shall not be used as a conductor for which identification is not required by these Rules; however, in the armoured cable, aluminum-sheathed cable, copper-sheathed cable, and non-metallic sheathed cable work, the identified conductor shall be permitted to be rendered permanently unidentified by (_____) or other suitable means at every point where the separate conductors have been rendered accessible and visible by ____ of the outer covering of the cable.

2) Where armoured cable, aluminum-sheathed cable, copper-sheathed cable, or non-metallic sheathed cable containing an identified conductor is used for single-pole, three way, or four way switch loops, it shall not be necessary to render the identified conductor permanently (unidentified at the switch) if the connections are made so that an unidentified conductor is the (return) conductor from the switch to the outlet.

3) Where armoured cable, aluminum-sheathed cable, copper, sheathed cable, or non-metallic sheathed cable is used so that the identified conductor forms no part of the circuit, the (identified conductor shall be ______) or other suitable means shall be employed to indicate clearly that the identified conductor does not form part of the circuit; this shall be done at every point where the separate conductors have been render accessible and visible by removal of the (outer covering) of the cable.

4. Where conductor of a multi-wire branch circuit are installed, employing an identified conductor the continuity of the identified conductor shall be _____ of device connections, such as lampholders, receptacles, ballasts, etc., so that devices can be disconnected without interrupting the continuity of the identified conductor.

Answer 32

painting, removal

cut off short

independent