Where documented safe switching procedures are established and maintained. But it must be monitored by
qualified persons
(see Art. 100).
Where documented safe switching procedures are established and maintained?
When a feeder circuit is installed under single management, documented safe switching procedures are established and maintained for disconnecting purposes, and qualified individuals monitor the installation as planned, the disconnecting means can be located in
the substation
.
Where the electrical power conductors are below the communication conductor on a pole they shall maintain a space not less than ____ for climbing space?
Conductors supported on poles shall provide a horizontal climbing space not less than the following: (1) Power conductors below communications conductors —
750 mm (30 in.)
(2) Power conductors alone or above communications conductors: a.
Which NEC covers branch circuits?
Article 210
, “Branch Circuits. NEC 2011, Article 210, “Branch Circuits,” in Chapter 2, “Wiring and Protection,” covers branch circuits except for those that supply only motor loads. The ratings for branch circuits are 15, 20, 30, 40, and 50 A.
Where direct buried conductors and cables emerge from grade?
Direct-buried conductors and cables emerging from grade and specified in columns 1 and 4 of Table 300.5 shall be protected by enclosures or raceways extending from the minimum cover distance below grade required by 300.5(A) to
a point at least 2.5 m (8 ft) above finished grade
.
Does a detached garage need a disconnect?
NO it does not
. A detached building fed from another building would require a disconnecting means nearest the entrance of the feeder conductors into the building.
What is the maximum length of a festoon lighting without a messenger wire?
Festoon lighting conductors must be at least 12 AWG, unless messenger wires support them. Overhead festoon lighting conductors must be supported by messenger wire (with strain insulators) when spans exceed
40 feet
[225.6(B)].
What circuits are not to be grounded?
Electrolytic cells are commonly used in the aluminum- and chlorine-processing industries.
Secondary circuits of low-voltage lighting system
must not be grounded, as indicated in Section 411.5(A). Also, low-voltage lighting systems for underwater pool lighting supplied by isolation transformers must not be grounded.
What does orange electrical wire mean?
Red or orange wires are often used to
provide the secondary phase voltage in a 220-volt application
. … You’ll find black and red or orange wires connected to 220-volt appliances like electric water heaters, well pumps, and older electric ranges.
What is a Class 2 circuit?
The NEC defines a Class 2 circuit as
that portion of the wiring system between the load side of a Class 2 power source and the connected equipment
. Due to its power limitations, a Class 2 circuit is considered safe from a fire initiation standpoint and provides acceptable protection from electrical shock.
How many receptacles can be on a 20 amp circuit?
Although the National Electric Code (NEC) doesn’t directly rule on limiting outlet installments on your circuit, it is crucial to learn its power draw restrictions. In general, you should have a
maximum of 10 outlets
on a 20A circuit.
What is general purpose branch circuit?
General purpose branch circuits are
120 volts circuits used for supplying lighting fixtures and receptacle outlets for most small portable appliances
. There are usually a number of general purpose branch circuits supplying lights and outlets in different rooms around a residence or commercial or industrial building.
Which does not need an individual branch circuit?
A
branch circuit that supplies one duplex receptacle that supplies two cord-and-plug-connected appliances or similar equipment
is not an individual branch circuit.
Can you run parallel conductors in the same conduit?
The code says that
you can only parallel 1/0awg and bigger
, and all conductors making the circuit must be installed in the same metallic conduit, and your conductors would have to be derated and possibly upsized.
How many conductors are there in a 14 2 Cu wire?
14 AWG=2 cu in. Four 14 AWG conductors=
4 wires
×2 cu in.
What is the code for underground wiring?
Low-voltage (no more than 30 volts) wiring must be buried at least 6 inches deep. Buried wiring runs that transition from underground to above ground must be protected in conduit from the required cover depth or 18 inches to its termination point above ground, or at least 8 feet above grade.
