IEC lesson 108 HW

Per the NEC® the number of receptacles required in an IEC classroom is ___. The room dimensions are 36 feet × 24 feet with a 3-foot wide door at the far end of one of the 36-foot long walls. Nobody lives there!

0

In a dwelling a receptacle shall be installed in a hallway that measures ___ feet or more measured along the centerline of the hallway.

10

When working on a ladder jack scaffold, adequate fall protection devices must be used when the scaffold height exceeds ___ feet above the floor below.

10

Ignoring the effects of voltage drop, a 20-ampere branch circuit requires ___ conductors.

12 AWG copper

Refer to the Article 100 definition for continuous load in the NEC®. According to 210.19(A) the branch-circuit conductors for a continuous load shall be sized at not less than ___ times the current drawn by the load.

125%

The maximum distance between the scaffold and the structure is ___. If you exceed this distance, you must install a standard guard rail.

14 inches or 18 inches for plasterers and lathers

Where 12 AWG THHN/THWN copper circuit conductors are connected to a 15-amp circuit breaker, the circuit is considered to be a ___-amp branch circuit.

15

Generally, scaffold planking must be at least ___ inches wide.

18

The NEC® requires two separate ___-ampere receptacle branch circuits for kitchens because cord-connected appliances used in residential kitchens (such as coffee makers, toasters, microwave ovens, and slow cookers) use a lot of current.

20

Section ___ in the NEC® requires that, for determining receptacle placement in dwellings, a wall space includes the space occupied by fixed panels in walls but excludes sliding panels.

210.52(A)(2)(2)

Section ___ in the NEC® has a requirement that, for dwellings, receptacle outlets along kitchen countertops shall be installed so that no point along the wall line is more than 600 mm (24 in.) measured horizontally from a receptacle outlet in that space.

210.52(C)(1)

The NEC® requirement for the location and number of outdoor dwelling receptacles is ___.

210.52(E)

According to the NEC® at 210.50(C), a receptacle outlet for a washing machine must be installed within ___ feet of where the machine is to be installed in a house.

6

For a single-family dwelling with a total of 3500 square feet of occupied area, the minimum number of 15-ampere lighting branch circuits is ___.

6

___ can prevent scaffolding accidents

Good housekeeping and safe procedures

Which of the following actual voltage readings would be considered to be nominal 120 volts? I. 128 II. 208 III. 110

I & III only

After ___, OSHA required that a lanyard system or guardrails be used to protect workers erecting and dismantling scaffolds, unless a competent person decides safe work practices can protect workers.

September 2, 1997

Generally receptacles are not mounted below the edge of kitchen countertops because it might create a hazard. For example, a child might pull on an appliance cord plugged into a below-the-countertop receptacle and pull a hot appliance, like a coffeepot or electric frying pan, over on himself.

True

According to NEC® Section 240.4(B), if the ampacity of a conductor does not match up with a standard fuse rating, what are you allowed to do?

Use the next higher standard rating

Dissimilar metals and other manufacturer's scaffold parts and materials can't be intermixed unless ___ determines that it is safe to do so.

a competent person

In general, ___ of a conductor must not be less than the rating of the overcurrent device protecting the conductor.

ampacity

Branch circuits that serve a ___ are required to be rated at 20 amperes where installed in a house.

bathroom, kitchen, or laundry room

Materials falling off scaffolds ___.

can be prevented by placing screening up to the guard rail

Planking on scaffolds ___.

cannot be painted, unless it is with a clear material

In construction of commercial and industrial facilities, the quantity and rating of electrical circuits is usually designed by the ___.

consulting engineer

The NEC® ___ require at least two 20-amp small-appliance branch circuits to supply power to countertop receptacles in the kitchen of a house.

does

How often should scaffolds be inspected?

each day before using

Where fixed glass panels (i.e., windows or non-sliding parts of doors) do not permit installation of wall-mounted receptacles, ___ are typically used to satisfy the receptacle spacing requirements of NEC® 210.52(A)(1) and (2).

floor-mounted receptacles

How many 20-amp small-appliance branch circuits are required by the NEC® to supply power to countertops in commercial restaurant kitchens?

none are required

___ may be used to raise worker height on a scaffold.

nothing

On a jobsite, you must keep tools and materials away from the edge ___ where they can be knocked off onto employees working below.

scaffold and floor openings

Nominal voltage includes a range of actual circuit voltages that are ___ the nominal voltage.

slightly above and slightly below

Section 210.52(A) in the NEC® (concerning receptacles in residences) deals with ___.

the "6-foot rule"

Branch circuits are rated according to ___.

the ampere rating of the overcurrent device

The NEC® defines a branch circuit as ___.

the circuit conductors between the final overcurrent device protecting the circuit and the outlet(s)