Six operations of the hand... ???????
What's the deal-e-o on 'six operations of the hand' ?
Six switches?
Six movements of a single lever to wind up some sort of a ratchet-n-release switch mechanism?
Other ?
The 'six operations of the hand' phrase is part of 230.71(B) Code subsection. See 230.71(B) down near bottom of this post.
= = = = = =
[quoting from the Code:]
Chapter 2 Wiring and Protection
ARTICLE 230 Services
VI. Service Equipment ? Disconnecting Means
230.71 Maximum Number of Disconnects.
(A) General. The service disconnecting means for each service permitted by 230.2, or for each set of service-entrance conductors permitted by 230.40, Exception No. 1, 3, 4, or 5, shall consist of not more than six switches or sets of circuit breakers, or a combination of not more than six switches and sets of circuit breakers, mounted in a single enclosure, in a group of separate enclosures, or in or on a switchboard. There shall be not more than six sets of disconnects per service grouped in any one location.
For the purpose of this section, disconnecting means installed as part of listed equipment and used solely for the following shall not be considered a service disconnecting means:
(1)
Power monitoring equipment
(2)
Surge-protective device(s)
(3)
Control circuit of the ground-fault protection system
(4)
Power-operable service disconnecting means
Section 230.71(A) specifies the maximum number of disconnects permitted as the disconnecting means for the service conductors that supply the building or structure. One set of service-entrance conductors, either overhead or underground, is permitted to supply two to six service disconnecting means in lieu of a single main disconnect. A single-occupancy building can have up to six disconnects for each set of service-entrance conductors. Multiple-occupancy buildings (residential or other than residential) can be provided with one main service disconnect or up to six main disconnects for each set of service-entrance conductors.
Multiple-occupancy buildings may have service-entrance conductors run to each occupancy, and each such set of service-entrance conductors may have from one to six disconnects (see 230.40, Exception No. 1).
Exhibit 230.25 shows a single enclosure for grouping service equipment that consists of six circuit breakers or six fused switches. This arrangement does not require a single main service disconnecting means. Six separate enclosures also would be permitted as the service equipment. Where factory-installed switches that disconnect power to surge protective devices and power monitoring equipment are included as part of listed equipment, the last sentence of 230.71(A) specifies that the disconnect switch for such equipment installed as part of the listed equipment does not count as one of the six service disconnecting means permitted by 230.71(A). The disconnecting means for the control circuit of ground-fault protection equipment or for a power-operable service disconnecting means are also not considered to be service disconnecting means where such disconnecting means are installed as a component of listed equipment.
Exhibit 230.25 [exhibit image shown at end of this post] A service equipment enclosure that groups six service 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 conductors of the service with no more than six operations of the hand.
(END QUOTE)
THANKS.
= = = = = =
(Exhibit 230.25 [below] A service equipment enclosure that groups six service disconnecting means)
What's the deal-e-o on 'six operations of the hand' ?
Six switches?
Six movements of a single lever to wind up some sort of a ratchet-n-release switch mechanism?
Other ?
The 'six operations of the hand' phrase is part of 230.71(B) Code subsection. See 230.71(B) down near bottom of this post.
= = = = = =
[quoting from the Code:]
Chapter 2 Wiring and Protection
ARTICLE 230 Services
VI. Service Equipment ? Disconnecting Means
230.71 Maximum Number of Disconnects.
(A) General. The service disconnecting means for each service permitted by 230.2, or for each set of service-entrance conductors permitted by 230.40, Exception No. 1, 3, 4, or 5, shall consist of not more than six switches or sets of circuit breakers, or a combination of not more than six switches and sets of circuit breakers, mounted in a single enclosure, in a group of separate enclosures, or in or on a switchboard. There shall be not more than six sets of disconnects per service grouped in any one location.
For the purpose of this section, disconnecting means installed as part of listed equipment and used solely for the following shall not be considered a service disconnecting means:
(1)
(2)
(3)
(4)
Section 230.71(A) specifies the maximum number of disconnects permitted as the disconnecting means for the service conductors that supply the building or structure. One set of service-entrance conductors, either overhead or underground, is permitted to supply two to six service disconnecting means in lieu of a single main disconnect. A single-occupancy building can have up to six disconnects for each set of service-entrance conductors. Multiple-occupancy buildings (residential or other than residential) can be provided with one main service disconnect or up to six main disconnects for each set of service-entrance conductors.
Multiple-occupancy buildings may have service-entrance conductors run to each occupancy, and each such set of service-entrance conductors may have from one to six disconnects (see 230.40, Exception No. 1).
Exhibit 230.25 shows a single enclosure for grouping service equipment that consists of six circuit breakers or six fused switches. This arrangement does not require a single main service disconnecting means. Six separate enclosures also would be permitted as the service equipment. Where factory-installed switches that disconnect power to surge protective devices and power monitoring equipment are included as part of listed equipment, the last sentence of 230.71(A) specifies that the disconnect switch for such equipment installed as part of the listed equipment does not count as one of the six service disconnecting means permitted by 230.71(A). The disconnecting means for the control circuit of ground-fault protection equipment or for a power-operable service disconnecting means are also not considered to be service disconnecting means where such disconnecting means are installed as a component of listed equipment.
Exhibit 230.25 [exhibit image shown at end of this post] A service equipment enclosure that groups six service 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 conductors of the service with no more than six operations of the hand.
(END QUOTE)
THANKS.
= = = = = =
(Exhibit 230.25 [below] A service equipment enclosure that groups six service disconnecting means)
Attachments
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