Other structure circuit requirements.

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transman2

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Brooklet,Ga.
All,

When pulling a branch circuit/circuits to a different structure for a receptacle is it required to install a disconnect, switch, or breaker? FYI, the pole structure has a branch circuit already there for lighting but a new nema box has been attached to the structure for Motorola equipment. Structures are 500 ft apart or more.
 
See part two of article 225 for all the details but some key points

Only one branch circuit allowed, if you need more power you have to run a feeder.

Grounding electrode system required for a feeder

Disconnecting means required.




I bet this thread goes a couple hundred posts .... :eek:hmy:
 
Your post #5 changes things a bit, IMO. Due to the difference in voltages, two circuits are allowed per 225.30(D).
IMO, since there are two circuits and it is not a MWBC, disconnects would be required per 225.33 and grounding electrodes system per 250.32

I also agree with Bob that this thread will have many posts with diverse opinions,.
 
Might as well post this whole thing, I think we will be batting it around.

This is from the 2011 NEC

II. Buildings or Other Structures Supplied by a
Feeder(s) or Branch Circuit(s)

225.30 Number of Supplies. A building or other structure
that is served by a branch circuit or feeder on the load side
of a service disconnecting means shall be supplied by only
one feeder or branch circuit unless permitted in 225.30(A)
through (E). For the purpose of this section, a multiwire
branch circuit shall be considered a single circuit.
Where a branch circuit or feeder originates in these
additional buildings or other structures, only one feeder or
branch circuit shall be permitted to supply power back to
the original building or structure, unless permitted in
225.30(A) through (E).

For the purpose of this section, a multiwire branch circuit
shall be considered a single circuit.

(A) Special Conditions. Additional feeders or branch circuits
shall be permitted to supply the following:

(1) Fire pumps

(2) Emergency systems

(3) Legally required standby systems

(4) Optional standby systems

(5) Parallel power production systems

(6) Systems designed for connection to multiple sources of
supply for the purpose of enhanced reliability

(B) Special Occupancies. By special permission, additional
feeders or branch circuits shall be permitted for either
of the following:

(1) Multiple-occupancy buildings where there is no space
available for supply equipment accessible to all occupants

(2) A single building or other structure sufficiently large to
make two or more supplies necessary

(C) Capacity Requirements. Additional feeders or branch
circuits shall be permitted where the capacity requirements are
in excess of 2000 amperes at a supply voltage of 600 volts or
less.

(D) Different Characteristics. Additional feeders or branch
circuits shall be permitted for different voltages, frequencies,
or phases or for different uses, such as control of
outside lighting from multiple locations.

(E) Documented Switching Procedures. Additional feeders
or branch circuits shall be permitted to supply installations
under single management where documented safe
switching procedures are established and maintained for
disconnection.

225.31 Disconnecting Means. Means shall be provided
for disconnecting all ungrounded conductors that supply or
pass through the building or structure.
225.32 Location. The disconnecting means shall be installed
either inside or outside of the building or structure
served or where the conductors pass through the building or
structure. The disconnecting means shall be at a readily
accessible location nearest the point of entrance of the conductors.
For the purposes of this section, the requirements
in 230.6 shall be utilized.

Exception No. 1: For installations under single management,
where documented safe switching procedures are established
and maintained for disconnection, and where the
installation is monitored by qualified individuals, the disconnecting
means shall be permitted to be located elsewhere
on the premises.

Exception No. 2: For buildings or other structures qualifying
under the provisions of Article 685, the disconnecting
means shall be permitted to be located elsewhere on the
premises.

Exception No. 3: For towers or poles used as lighting
standards, the disconnecting means shall be permitted to be
located elsewhere on the premises.

Exception No. 4: For poles or similar structures used only
for support of signs installed in accordance with Article
600, the disconnecting means shall be permitted to be located
elsewhere on the premises.

225.33 Maximum Number of Disconnects.
(A) General. The disconnecting means for each supply
permitted by 225.30 shall consist of not more than six
switches or six circuit breakers mounted in a single enclosure,
in a group of separate enclosures, or in or on a switchboard.
There shall be no more than six disconnects per
supply grouped in any one location.

Exception: For the purposes of this section, disconnecting
means used solely for the control circuit of the ground-fault
protection system, or the control circuit of the poweroperated
supply disconnecting means, installed as part of
the listed equipment, shall not be considered a supply disconnecting
means.

(B) Single-Pole Units. Two or three single-pole switches
or breakers capable of individual operation shall be permitted
on multiwire circuits, one pole for each ungrounded
conductor, as one multipole disconnect, provided they are
equipped with identified handle ties or a master handle to
disconnect all ungrounded conductors with no more than
six operations of the hand.
225.34 Grouping of Disconnects.

(A) General. The two to six disconnects as permitted in
225.33 shall be grouped. Each disconnect shall be marked
to indicate the load served.

Exception: One of the two to six disconnecting means
permitted in 225.33, where used only for a water pump also
intended to provide fire protection, shall be permitted to be
located remote from the other disconnecting means.

(B) Additional Disconnecting Means. The one or more
additional disconnecting means for fire pumps or for emergency,
legally required standby or optional standby system
permitted by 225.30 shall be installed sufficiently remote
from the one to six disconnecting means for normal supply
to minimize the possibility of simultaneous interruption of
supply.
Click to expand...
 
And the rest

225.35 Access to Occupants. In a multiple-occupancy
building, each occupant shall have access to the occupant?s
supply disconnecting means.

Exception: In a multiple-occupancy building where electric
supply and electrical maintenance are provided by the
building management and where these are under continuous
building management supervision, the supply disconnecting
means supplying more than one occupancy shall be
permitted to be accessible to authorized management personnel
only.

225.36 Suitable for Service Equipment. The disconnecting
means specified in 225.31 shall be suitable for use as
service equipment.

Exception: For garages and outbuildings on residential
property, a snap switch or a set of 3-way or 4-way snap
switches shall be permitted as the disconnecting means.

225.37 Identification. Where a building or structure has any
combination of feeders, branch circuits, or services passing
through it or supplying it, a permanent plaque or directory
shall be installed at each feeder and branch-circuit disconnect
location denoting all other services, feeders, or branch circuits
supplying that building or structure or passing through that
building or structure and the area served by each.

Exception No. 1: A plaque or directory shall not be required
for large-capacity multibuilding industrial installations
under single management, where it is ensured that
disconnection can be accomplished by establishing and
maintaining safe switching procedures.

Exception No. 2: This identification shall not be required
for branch circuits installed from a dwelling unit to a sec-
cond building or structure.


225.38 Disconnect Construction. Disconnecting means
shall meet the requirements of 225.38(A) through (D).
Exception: For garages and outbuildings on residential
property, snap switches or 3-way or 4-way snap switches shall
be permitted as the disconnecting means.

(A) Manually or Power Operable. The disconnecting
means shall consist of either (1) a manually operable switch or
a circuit breaker equipped with a handle or other suitable operating
means or (2) a power-operable switch or circuit
breaker, provided the switch or circuit breaker can be opened
by hand in the event of a power failure.

(B) Simultaneous Opening of Poles. Each building or structure
disconnecting means shall simultaneously disconnect all
ungrounded supply conductors that it controls from the building
or structure wiring system.

(C) Disconnection of Grounded Conductor. Where the
building or structure disconnecting means does not disconnect
the grounded conductor from the grounded conductors
in the building or structure wiring, other means shall be
provided for this purpose at the location of disconnecting
means. A terminal or bus to which all grounded conductors
can be attached by means of pressure connectors shall be
permitted for this purpose.

In a multisection switchboard, disconnects for the
grounded conductor shall be permitted to be in any section
of the switchboard, provided any such switchboard
section is marked.

(D) Indicating. The building or structure disconnecting
means shall plainly indicate whether it is in the open or
closed position.

225.39 Rating of Disconnect. The feeder or branch-circuit
disconnecting means shall have a rating of not less than the
calculated load to be supplied, determined in accordance
with Parts I and II of Article 220 for branch circuits, Part III
or IV of Article 220 for feeders, or Part V of Article 220 for
farm loads. Where the branch circuit or feeder disconnecting
means consists of more than one switch or circuit
breaker, as permitted by 225.33, combining the ratings of
all the switches or circuit breakers for determining the rating
of the disconnecting means shall be permitted. In no
case shall the rating be lower than specified in 225.39(A),
(B), (C), or (D).

(A) One-Circuit Installation. For installations to supply
only limited loads of a single branch circuit, the branch
circuit disconnecting means shall have a rating of not less
than 15 amperes.

(B) Two-Circuit Installations. For installations consisting
of not more than two 2-wire branch circuits, the feeder or
branch-circuit disconnecting means shall have a rating of
not less than 30 amperes.

(C) One-Family Dwelling. For a one-family dwelling, the
feeder disconnecting means shall have a rating of not less
than 100 amperes, 3-wire.

(D) All Others. For all other installations, the feeder or
branch-circuit disconnecting means shall have a rating of
not less than 60 amperes.

225.40 Access to Overcurrent Protective Devices. Where
a feeder overcurrent device is not readily accessible, branchcircuit
overcurrent devices shall be installed on the load side,
shall be mounted in a readily accessible location, and shall be
of a lower ampere rating than the feeder overcurrent device.
Click to expand...
 
IMHO.... if the new communication equipment is connected to one circuit, then the wires feeding it are not a feeder but a branch circuit.

If more than one circuit to the pole is required, for either system, then the wires to the pole become feeders. :)
 
xformer said:
IMHO.... if the new communication equipment is connected to one circuit, then the wires feeding it are not a feeder but a branch circuit.

If more than one circuit to the pole is required, for either system, then the wires to the pole become feeders. :)
Click to expand...
They only become feeders if there are OCPDs at the second building.

If you are permitted to have more than one branch circuit feeding the second structure, you are required to have a grounding electrode system at the second building.

If the structure is a tower or pole used as a lighting standard, Exception #3 to 225.32 would permit you to have the disconnect at a location other than the pole.
 
don_resqcapt19 said:
They only become feeders if there are OCPDs at the second building.

If you are permitted to have more than one branch circuit feeding the second structure, you are required to have a grounding electrode system at the second building.

If the structure is a tower or pole used as a lighting standard, Exception #3 to 225.32 would permit you to have the disconnect at a location other than the pole.
Click to expand...

Doesn't the addition to the NEC 2011 permit the two branch circuits or are we looking at this as failing to meet the requirements of Art. 225 Part 2?
 
xformer said:
Doesn't the addition to the NEC 2011 permit the two branch circuits or are we looking at this as failing to meet the requirements of Art. 225 Part 2?
Click to expand...
250.32(A) requires a grounding electrode at the second structure. The exception says that grounding electrode is not needed if the second structure is fed from a single branch circuit.
 
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