Free C-10 Practice Questions: Finish Wiring & Trim
60 free questions with answers, explanations and the source for each. Answer one to see why. No sign-up.
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1 / 60
A receptacle in a damp location, such as a location protected from the weather, must have:
In a damp location the receptacle must have an enclosure that is weatherproof when the receptacle is covered (attachment plug cap not inserted and receptacle covers closed) (CEC 406.9(A)).
Source: CEC 406.9(A)
2 / 60
A SURFACE-mounted LED luminaire with an enclosed light source in a clothes closet must have at least ___ clearance from the nearest storage space:
Surface-mounted enclosed incandescent/LED requires 12 in from closet storage space.
Source: CEC 410.16(D)(1)
3 / 60
For an attic lighting outlet serving equipment, a lighting outlet must be located:
Where a lighting outlet is installed for equipment requiring service, it must be installed at or near the equipment; a point of control is also required at each entry that permits access to the space (CEC 210.70(C)).
Source: CEC 210.70(C)
4 / 60
When receptacles are replaced, the replacement must comply with:
Replacement of receptacles must comply with 406.4(D)(1) through (D)(8), as applicable (CEC 406.4(D)); those subsections include the grounding, GFCI and AFCI rules for replacements.
Source: CEC 406.4(D)
5 / 60
A required lighting outlet serving equipment in a dwelling attic/under-floor space must be located:
The lighting outlet must be at or near the equipment requiring servicing.
Source: CEC 210.70(C)
6 / 60
Receptacles installed on 15 A and 20 A branch circuits must be of the ___ type:
Except as provided in 406.4(D) for replacements, receptacles installed on 15- and 20-ampere branch circuits must be of the grounding type (CEC 406.4(A)).
Source: CEC 406.4(A)
7 / 60
A wall-switch-controlled lighting outlet is required in:
Hallways, stairways, attached garages (and detached garages with power) require a controlled lighting outlet.
Source: CEC 210.70(A)(2)(1)
8 / 60
Under 410.36, outlet boxes complying with 314.27(E) shall be considered:
410.36: outlet boxes complying with 314.27(E) shall be considered lighting outlets as required by 210.70(A), (B), and (C).
Source: CEC 410.36
9 / 60
An outlet box used as the SOLE support of a ceiling paddle fan must be:
Outlet boxes or outlet box systems used as the sole support of a ceiling-suspended (paddle) fan must be listed and marked (CEC 314.27(C)).
Source: CEC 314.27(C)
10 / 60
At least one wall-switch-controlled lighting outlet is required at:
An exterior controlled lighting outlet is required at outdoor entrances/exits with grade-level access.
Source: CEC 210.70(A)(2)(2)
11 / 60
When replacing a receptacle where an equipment grounding conductor IS present in the box, the replacement must be:
With an EGC present, the replacement must be grounding-type connected to the EGC.
Source: CEC 406.4(D)(1); 250.146
12 / 60
A luminaire installed in a damp location must be marked as:
All luminaires installed in damp locations must be marked as suitable for wet locations or suitable for damp locations (CEC 410.10(A)).
Source: CEC 410.10(A)
13 / 60
Under 406.4, when you replace an automatically controlled receptacle (for example, one switched by an energy-management system), the replacement must be:
406.4: automatically controlled receptacles shall be replaced with equivalently controlled receptacles.
Source: CEC 406.4
14 / 60
You are replacing receptacles on a service call. Under 406.4, arc-fault circuit-interrupter type and ground-fault circuit-interrupter type receptacles must be installed:
406.4: arc-fault circuit-interrupter type and ground-fault circuit-interrupter type receptacles shall be installed in a readily accessible location.
Source: CEC 406.4
15 / 60
The homeowner wants a decorative pendant over the bathtub. Under 410.10, the zone that must be kept free of all parts of pendants extends 3 ft horizontally from the tub and, measured vertically from the top of the bathtub rim:
410.10: no parts of cord-connected or suspended luminaires, lighting track, pendants, or paddle fans with light kits shall be within a zone 3 ft horizontally and 8 ft vertically from the top of the bathtub rim or shower stall threshold.
Source: CEC 410.10
16 / 60
Besides the manual-override-at-switch option, occupancy sensors are also permitted to control required lighting when they are:
Occupancy sensors may be installed in addition to the required wall-mounted controls.
Source: CEC 210.70 Exception No. 2(1)
17 / 60
At a dwelling, the outdoor patio receptacle (a wet location) must be BOTH:
Nonlocking 15- and 20-ampere, 125- and 250-volt receptacles in dwelling units must be listed tamper-resistant (CEC 406.12), and receptacles in wet locations must be listed and so identified as the weather-resistant type (CEC 406.9(B)).
Source: CEC 406.12(1); 406.9(B)(1)
18 / 60
Under 406.9, after installation, the hinged covers of outlet box hoods on wet-location receptacles must be able to open at least:
406.9: hinged covers of outlet box hoods shall be able to open at least 90 degrees after installation, or fully open if the cover is not designed to open that far.
Source: CEC 406.9
19 / 60
When replacing a receptacle located in an area specified in 210.12(A), (B), or (C), the replacement must:
If a receptacle located in any area specified in 210.12(A), (B), or (C) is replaced, the replacement must be a listed outlet branch-circuit type AFCI receptacle, a receptacle protected by one, or a receptacle protected by a listed combination type AFCI (CEC 406.4(D)(4)).
Source: CEC 406.4(D)(4)
20 / 60
On the patio (a wet location) you install a flush-mounted switch for the patio light. Under 404.4 (Damp or Wet Locations), a flush-mounted switch or circuit breaker must be equipped with:
404.4: in damp or wet locations, a flush-mounted switch or circuit breaker shall be equipped with a weatherproof cover.
Source: CEC 404.4
21 / 60
Lighting outlets for attics, underfloor spaces, utility rooms and basements used for storage or containing equipment requiring servicing are required by:
CEC 210.70(C), All Occupancies, requires at least one lighting outlet in attics and underfloor spaces, utility rooms, and basements that are used for storage or contain equipment requiring servicing.
Source: CEC 210.70(C)
22 / 60
The homeowner is adding an electronic bidet seat, and the toilet sits beside the tub. Under Exception No. 4 to 406.9, what is permitted?
406.9 Exception No. 4: in a dwelling unit, a single receptacle is permitted for an electronic toilet or personal hygiene device such as an electronic bidet seat; it must be readily accessible and not located between the toilet and the bathtub or shower.
Source: CEC 406.9
23 / 60
Unless a recessed luminaire is identified as Type IC, thermal insulation is prohibited above it and within ___ of its enclosure, wiring compartment, ballast, transformer, LED driver, or power supply:
Unless a recessed luminaire is identified as Type IC for insulation contact, thermal insulation must not be installed above it or within 75 mm (3 in.) of its enclosure, wiring compartment, ballast, transformer, LED driver, or power supply (CEC 410.116(B)).
Source: CEC 410.116(B)
24 / 60
A customer hands you reconditioned luminaires salvaged from another job. Under 410.2, reconditioned luminaires, lampholders, ballasts, LED drivers, lamps, and retrofit kits:
410.2: reconditioned luminaires, lampholders, ballasts, LED drivers, lamps, and retrofit kits shall not be permitted.
Source: CEC 410.2
25 / 60
A luminaire marked 'Suitable for Wet Locations' may be installed in:
Luminaires in wet locations must be marked as suitable for wet locations, and luminaires in damp locations must be marked as suitable for wet locations or suitable for damp locations, so a wet-location luminaire may be used in either (CEC 410.10(A)).
Source: CEC 410.10(A)
26 / 60
For a required lighting outlet in a dwelling attic/under-floor space containing equipment requiring servicing, a point of control must be located:
CEC 210.70(C), All Occupancies, requires a point of control at each entry that permits access to the attic and underfloor space, utility room, or basement.
Source: CEC 210.70(C)
27 / 60
Under 410.117, tap conductors from a luminaire to an outlet box must be in suitable raceway or Type AC or MC cable at least 18 in. long, with a maximum length of:
410.117: luminaire tap conductors shall be in suitable raceway or Type AC or MC cable at least 18 in. but not more than 6 ft in length.
Source: CEC 410.117
28 / 60
Thermal insulation may be installed above a recessed luminaire only when the luminaire is:
Thermal insulation must not be installed above a recessed luminaire, or within 75 mm (3 in.) of its enclosure and other listed parts, unless the luminaire is identified as Type IC for insulation contact (CEC 410.116(B)).
Source: CEC 410.116(A)(2); 410.116(B)
29 / 60
You trim out a receptacle with a stainless steel faceplate. Under 406.5, after installation the receptacle face must project from metal faceplates a minimum of:
406.5: after installation, receptacle faces shall be flush with or project from insulating faceplates, and shall project a minimum of 0.015 in. from metal faceplates.
Source: CEC 406.5
30 / 60
In a DWELLING, an attic, under-floor space, utility room, or basement requires a lighting outlet under 210.70(C) when the space:
A lighting outlet is required where the space is used for storage or contains equipment requiring servicing.
Source: CEC 210.70(C)
31 / 60
Under 410.117, when tap conductors suitable for the temperature run from a luminaire terminal connection to a separate outlet box, that outlet box must be placed at least how far from the luminaire?
410.117: tap conductors of a type suitable for the temperature encountered may run from the luminaire terminal connection to an outlet box placed at least 1 ft from the luminaire.
Source: CEC 410.117
32 / 60
When replacing a receptacle in a box with NO equipment grounding conductor, one permitted option is:
Without an EGC: non-grounding, or GFCI marked 'No Equipment Ground', or grounding type on a GFCI-protected circuit.
Source: CEC 406.4(D)(2)
33 / 60
[Bathroom + outdoor patio trim-out] In this dwelling unit, the 15-ampere, 125-volt nonlocking bathroom receptacle must be listed as:
CEC 406.12(1) requires 15- and 20-ampere, 125- and 250-volt nonlocking-type receptacles in all dwelling units to be listed tamper-resistant, which includes a dwelling bathroom. Weather-resistant is the listing for receptacles in wet locations (CEC 406.9(B)), such as the patio receptacle in the same job.
Source: CEC 406.12(1)
34 / 60
A ceiling box marked as acceptable for fan support may support a paddle fan up to:
A fan-rated ceiling box may support a fan up to its marked maximum weight, never more than 70 lb.
Source: CEC 314.27(C)
35 / 60
The outdoor patio receptacle (wet location) must be listed as ___ and have an enclosure that is weatherproof whether or not the plug is inserted:
In a wet location, receptacles must be listed and so identified as the weather-resistant type, and 15- and 20-ampere, 125- and 250-volt receptacles need an enclosure that is weatherproof whether or not the attachment plug cap is inserted (CEC 406.9(B)).
Source: CEC 406.9(B)(1)
36 / 60
Downstream of that GFCI, there is still no equipment grounding conductor, and you install three-prong grounding-type receptacles that are supplied through the ground-fault circuit interrupter. Under 406.4, those receptacles or their cover plates must be marked:
406.4: where grounding-type receptacles are supplied through the GFCI, the receptacles or their cover plates shall be marked "GFCI Protected" and "No Equipment Ground," visible after installation.
Source: CEC 406.4
37 / 60
At a ceiling lighting outlet, the interior of the box must be marked by the manufacturer to indicate:
For ceiling outlets, the interior of the box must be marked by the manufacturer to indicate the maximum weight the box is permitted to support (CEC 314.27(A)).
Source: CEC 314.27(A); 410.36
38 / 60
A receptacle mounted in a box that is set back from the finished surface must be installed so its mounting yoke or strap is:
Receptacles mounted in boxes that are set back from the finished surface must be installed so the mounting yoke or strap is held rigidly at the finished surface (CEC 406.5(A)).
Source: CEC 406.5(A)
39 / 60
A homeowner wants a battery-powered wireless wall control for a required lighting outlet. Under 210.70, the switch or listed wall-mounted control device may rely exclusively on battery power only if it incorporates:
210.70: the switch or listed wall-mounted control device shall not rely exclusively on battery power unless it incorporates a positive means of notification of impending battery depletion.
Source: CEC 210.70
40 / 60
A recessed luminaire identified for contact with insulation (Type IC) is permitted to:
A recessed luminaire identified for contact with insulation, Type IC, is permitted to be in contact with combustible materials at recessed parts, points of support, and portions passing through or finishing off the opening in the building structure (CEC 410.116(A)).
Source: CEC 410.116(A)(1)
41 / 60
Which luminaire type does CEC 410.16(C) prohibit in a clothes closet?
Incandescent luminaires with open or partially enclosed lamps, and pendant luminaires or lampholders, are not permitted in clothes closets (CEC 410.16(C)). Surface-mounted or recessed incandescent or LED luminaires with completely enclosed light sources, and surface-mounted fluorescent or LED luminaires identified for the closet storage space, are permitted (CEC 410.16(B)).
Source: CEC 410.16(C)
42 / 60
What is the heaviest ceiling paddle fan that a listed outlet box may carry as its sole support?
Outlet boxes used as the sole support of a ceiling-suspended (paddle) fan must be listed and marked, and must not support fans that weigh more than 32 kg (70 lb) (CEC 314.27(C)).
Source: CEC 314.27(C)
43 / 60
Receptacle faceplates must:
Faceplates must completely cover the opening and seat against the mounting surface.
Source: CEC 406.6
44 / 60
Luminaires in wet or damp locations must be installed so that:
Wet/damp-location luminaires must prevent water entry/accumulation in electrical parts.
Source: CEC 410.10(A)
45 / 60
You are setting lay-in LED troffers in a suspended ceiling. Under 410.36, each luminaire must be securely fastened to the ceiling framing member by:
410.36: luminaires shall be securely fastened to the ceiling framing member by mechanical means such as bolts, screws, or rivets; listed clips identified for the framing member and luminaire are also permitted.
Source: CEC 410.36
46 / 60
The ballast of a fluorescent luminaire installed indoors must have:
The ballast of a fluorescent luminaire installed indoors must have integral thermal protection (CEC 410.130(E)(1)); transformers of the oil-filled type must not be used (CEC 410.130(C)).
Source: Lighting (fluorescent)
47 / 60
A recessed luminaire goes in the shower ceiling where it is subject to shower spray. Under 410.10, it must be marked:
410.10: luminaires located where subject to shower spray shall be marked suitable for wet locations.
Source: CEC 410.10
48 / 60
Under CEC 404.14(F), a general-use dimmer switch may control loads other than permanently connected loads only when it is:
General-use dimmer switches must be used only to control permanently connected loads, such as incandescent luminaires, unless listed for the control of other loads and installed accordingly (CEC 404.14(F)).
Source: Lighting controls (LED dimming)
49 / 60
A fan-support box intended for fans heavier than 35 lb must be:
A box intended to support a fan over 35 lb must be marked with its maximum permitted fan weight.
Source: CEC 314.27(C)
50 / 60
Every outlet box in the job must have:
Each completed box needs a cover, faceplate, lampholder, or luminaire canopy.
Source: CEC 314.25
51 / 60
In a hotel/motel guest room or suite, at least one wall-device-controlled lighting outlet must be in:
Every habitable room and bathroom of the guest room/suite requires a wall-controlled lighting outlet.
Source: CEC 210.70(B)
52 / 60
A metal faceplate must be:
Metal faceplates must be grounded (CEC 406.6(B)).
Source: CEC 406.6(B)
53 / 60
For the required lighting outlet at an outdoor entrance/exit with grade-level access, an overhead vehicle (garage) door is:
CEC 210.70(A) requires at least one exterior lighting outlet, controlled by a listed wall-mounted control device, to illuminate the exterior side of outdoor entrances or exits with grade-level access, and states that a vehicle door in a garage is not considered as an outdoor entrance or exit.
Source: CEC 210.70(A)(2)
54 / 60
The lighting-outlet requirement for storage/equipment attics, under-floor spaces, utility rooms, and basements applies in:
The rule is CEC 210.70(C), titled All Occupancies: attics and underfloor spaces, utility rooms, and basements used for storage or containing equipment requiring servicing need at least one lighting outlet controlled by a wall switch or listed wall-mounted control device, with a point of control at each entry that permits access. It applies to dwellings and every other occupancy.
Source: CEC 210.70(C)
55 / 60
Luminaire clearances in a closet are measured to the clothes closet storage space. Under the Article 100 definitions, clothes closet storage space is:
Article 100: clothes closet storage space is the area within a clothes closet in which combustible materials can be kept.
Source: CEC Art. 100
56 / 60
Every outlet box must be provided with:
A completed outlet box must have a cover, faceplate, lampholder, or luminaire canopy.
Source: CEC 314.25
57 / 60
A RECESSED incandescent or LED luminaire (enclosed light source) in a closet must have at least ___ clearance from the storage space:
Recessed enclosed incandescent/LED requires 6 in from closet storage space.
Source: CEC 410.16(D)(3)
58 / 60
At the open patio (a wet location) you install a 15-ampere, 125-volt receptacle under an in-use outlet box hood. Under 406.9, the outlet box hood must be listed and identified as:
406.9: 15- and 20-ampere, 125- and 250-volt receptacles in a wet location need an enclosure that is weatherproof whether or not a plug is inserted, and an outlet box hood installed for this purpose shall be listed and identified as extra-duty.
Source: CEC 406.9
59 / 60
The grounding contacts of a receptacle must be connected to the:
A receptacle's grounding terminal is connected to an equipment grounding conductor (CEC 250.146).
Source: CEC 406.11; 250.146
60 / 60
At least one receptacle must be within ___ of the outside edge of the bathroom basin:
At least one receptacle outlet must be installed in bathrooms within 900 mm (3 ft) of the outside edge of the basin (CEC 210.52(D)).