shortcircuit2
Senior Member
- Location
- South of Bawstin
Here is a early draft...
705.11 Supply-Side Source Connections.
An electric power production source, where connected on the supply side of the service disconnecting means as permitted in 230.82(6), shall comply with 705.11(A) through (F).
(A) Output Rating. The sum of the power source continuous current output ratings on a service, other than those controlled in accordance with 705.13 , shall not exceed the ampacity of the service conductors.
Informational Note: See Article 100 definition for Service Conductors.
(B) Conductors. The power source output circuit conductors from the service conductors point of connection to the first overcurrent protection device shall be sized in accordance with 705.28 and in no case sized smaller than#6 AWG copper or #4 AWG aluminum. These conductors shall be installed in accordance with 230.30 or 230.43.
(C) Overcurrent Protection. The power source output circuit conductors shall be protected from overcurrent in accordance with 705.28 and 705.30 . If fuses are not integral with the disconnecting means the disconnecting means shall be located on the service side of the fuses. Where the power source output circuit conductors make theirconnection to the service outside of a building, they shall be protected by overcurrent devices in a readily accessible location outside the building or at the first readily accessible location where the power source conductors enter the building. Where the power source output circuit conductors make their connection to the service inside a building, they shall be protected with one of the following methods:
(1) Within 5 m (16.5 ft). With an overcurrent device within 5 m (16.5 ft) of conductor length from the pointof connection to the service
(2) Within 20 m (71 ft). With cable limiters at the connection to the service and an overcurrent devicelocated within 20 m (71 ft) of conductor length from the point of connection to the service
(D) Bonding and Grounding. All metal enclosures, metallic wiring methods, and metal parts associated with the power source output conductors in 705.11(B) shall be bonded in accordance with 250.92(B). This metallic equipment shall be connected to the grounding electrode system for the service at the power source disconnecting means withonly one of the methods in 705.11(D)(1) or (D)(2). Where the power sources use a grounded conductor,705.11(D)(1) shall apply.
(1) Grounded Conductor Brought to Power Source Disconnecting Means. Where a grounded service conductor is brought to the power source disconnecting means, the grounded conductor shall be connected to the disconnecting means grounded conductor terminal or bus. A bonding conductor shall connect the grounded service conductor to the metallic equipment enclosing the power source output circuit conductors. This bonding conductor shall be sized in accordance with 250.102 based on the size of the power source output circuit conductors.
(2) Grounded Conductor Not Brought to Power Source Disconnecting Means.Where a grounded service conductor is not brought to the power source disconnecting means, the metallicequipment enclosing the power source output circuit conductors shall be bonded to the grounding electrodesystem using a separate bonding conductor sized in accordance with 250.102 based on the size of thepower source output circuit conductors.
(E) Connections. The connection of power source output circuit conductors to the service conductors shall be made using listed connectors as described in 110.14 and comply with all enclosure fill requirements Any modifications to existing equipment shall be made in accordance with the manufacturer’s instructions or the modification must be field labeled.
Informational Note: Electric utilities enforce their requirements for connections to equipment under their control. See 90.2.
(F) Disconnecting Means. The power source disconnecting means shall meet the requirements of 705.20 . The power source disconnecting means shall not be considered as one of the service disconnecting means as required by 230.70. The requirements of 230.71 or 230.72 shall not apply to the power source disconnecting means.The conductors between the point of connection and the disconnect shall be connected to the line side of the disconnect.
(G) Ground-Fault Protection. For connections rated 1000 amperes or more to solidly grounded wye services exceeding 150 volts to ground but not exceeding 1000 volts, phase-to-phase, ground-fault protection meeting the requirements of 230.95 shall be provided.
Submitter Information Verification
Submitter Full Name: NEC-CMP Panel 04
Organization: [ Not Specified ]
Street Address:
City:
State:
Zip:
Submittal Date: Wed Jan 17 15:27:27 EST 2018
Committee Statement and Meeting Notes
Committee Statement:
This revision addresses connections made by electric power production sources on the supply side of the service disconnecting means. Rather than making numerous references to Article 230 and Article 250, most of the requirements are specifically called out in the new 705.11. There are references to wiring methods in 230.30 and 230.43 since those wiring methods are for similar conductors on the supply side of a service disconnect.
The output rating limit is expressed as the sum of continuous currents from the various non-controlledpower production sources. Sources that comply with the new 705.13 can be curtailed based on theampacity of the service conductors and could be completely shut down if the non-controlled sourcesbegan to approach the ampacity of the service conductors.
The point of connection section, 705.12, has been divided into two sections. 705.12(A) has been moved to 705.11, Supply Side Source Connections and 705.12(B) has become 705.12 with the new title "Load Side Source Connections."
The language in 705.12(A) is preserved in the charging paragraph with the reference to 230.82(6). The overcurrent requirements are revised and moved from 705.12(A) into 705.11(A), Output Rating. Rather than limiting the sum of all overcurrent devices connected to power production sources, the limitation is the ampacity of the service conductors.
Section 705.11(B) sets a minimum conductor size of 6 AWG copper and 4 AWG aluminum for connections on the supply side of the service disconnecting means. The references to 230.30 and 230.43 are intended to limit the allowed wiring methods to the same methods allowed for service conductors on the supply side of the service disconnect.
Section 705.11(C) sets forth the requirements for overcurrent protection of the power source output conductors. This section also states that the overcurrent protection be located in a readily accessible location either outside of a building or at the first point of entry. If the service is inside a building, two options are available for the location of overcurrent protection. These options come from 705.31 expanding the distance from to 5m for the distance to an overcurrent device without current limiters and further limits the furthest distance allowed for installations with current limiters to 20m.
Section 705.11(D) deals with the grounding and bonding of metal equipment associated with conductors connected on the supply side of the service disconnect. The equipment is to be bonded in a similar way as service equipment. The primary difference in how it is connected to the grounding electrode system depends on whether or not a grounded conductor is brought to the power source disconnect. The size of the bonding conductor is based on the size of the power source output circuit conductors and not on the size of the service conductors.
Section 705.11(E) covers the type of connections that are permitted for conductors. The connections must be made with listed connectors. The last sentence clarifies that modifications to existing equipment must be covered in the manufacturer’s instructions or get a field evaluation and label to certify the connection. The informational note under (E) was added to clarify that supply side installation should not cross into the utility owned equipment.
Section 705.11(F) clarifies that a power source disconnecting means does not count toward the maximum of six disconnects discussed in 230.71 and is not required to be grouped in accordance 230.72. The disconnect must comply with 705.20 as it will often be the source disconnect.
In 705.11(G), a reference to 230.95 was added since the requirements of 230.95 address failures on systems above 150V to ground due to ground faults. These were due to relatively slow clearing times for ground-fault current. The same hazard exists for connections to the supply side of a service.
705.11 Supply-Side Source Connections.
An electric power production source, where connected on the supply side of the service disconnecting means as permitted in 230.82(6), shall comply with 705.11(A) through (F).
(A) Output Rating. The sum of the power source continuous current output ratings on a service, other than those controlled in accordance with 705.13 , shall not exceed the ampacity of the service conductors.
Informational Note: See Article 100 definition for Service Conductors.
(B) Conductors. The power source output circuit conductors from the service conductors point of connection to the first overcurrent protection device shall be sized in accordance with 705.28 and in no case sized smaller than#6 AWG copper or #4 AWG aluminum. These conductors shall be installed in accordance with 230.30 or 230.43.
(C) Overcurrent Protection. The power source output circuit conductors shall be protected from overcurrent in accordance with 705.28 and 705.30 . If fuses are not integral with the disconnecting means the disconnecting means shall be located on the service side of the fuses. Where the power source output circuit conductors make theirconnection to the service outside of a building, they shall be protected by overcurrent devices in a readily accessible location outside the building or at the first readily accessible location where the power source conductors enter the building. Where the power source output circuit conductors make their connection to the service inside a building, they shall be protected with one of the following methods:
(1) Within 5 m (16.5 ft). With an overcurrent device within 5 m (16.5 ft) of conductor length from the pointof connection to the service
(2) Within 20 m (71 ft). With cable limiters at the connection to the service and an overcurrent devicelocated within 20 m (71 ft) of conductor length from the point of connection to the service
(D) Bonding and Grounding. All metal enclosures, metallic wiring methods, and metal parts associated with the power source output conductors in 705.11(B) shall be bonded in accordance with 250.92(B). This metallic equipment shall be connected to the grounding electrode system for the service at the power source disconnecting means withonly one of the methods in 705.11(D)(1) or (D)(2). Where the power sources use a grounded conductor,705.11(D)(1) shall apply.
(1) Grounded Conductor Brought to Power Source Disconnecting Means. Where a grounded service conductor is brought to the power source disconnecting means, the grounded conductor shall be connected to the disconnecting means grounded conductor terminal or bus. A bonding conductor shall connect the grounded service conductor to the metallic equipment enclosing the power source output circuit conductors. This bonding conductor shall be sized in accordance with 250.102 based on the size of the power source output circuit conductors.
(2) Grounded Conductor Not Brought to Power Source Disconnecting Means.Where a grounded service conductor is not brought to the power source disconnecting means, the metallicequipment enclosing the power source output circuit conductors shall be bonded to the grounding electrodesystem using a separate bonding conductor sized in accordance with 250.102 based on the size of thepower source output circuit conductors.
(E) Connections. The connection of power source output circuit conductors to the service conductors shall be made using listed connectors as described in 110.14 and comply with all enclosure fill requirements Any modifications to existing equipment shall be made in accordance with the manufacturer’s instructions or the modification must be field labeled.
Informational Note: Electric utilities enforce their requirements for connections to equipment under their control. See 90.2.
(F) Disconnecting Means. The power source disconnecting means shall meet the requirements of 705.20 . The power source disconnecting means shall not be considered as one of the service disconnecting means as required by 230.70. The requirements of 230.71 or 230.72 shall not apply to the power source disconnecting means.The conductors between the point of connection and the disconnect shall be connected to the line side of the disconnect.
(G) Ground-Fault Protection. For connections rated 1000 amperes or more to solidly grounded wye services exceeding 150 volts to ground but not exceeding 1000 volts, phase-to-phase, ground-fault protection meeting the requirements of 230.95 shall be provided.
Submitter Information Verification
Submitter Full Name: NEC-CMP Panel 04
Organization: [ Not Specified ]
Street Address:
City:
State:
Zip:
Submittal Date: Wed Jan 17 15:27:27 EST 2018
Committee Statement and Meeting Notes
Committee Statement:
This revision addresses connections made by electric power production sources on the supply side of the service disconnecting means. Rather than making numerous references to Article 230 and Article 250, most of the requirements are specifically called out in the new 705.11. There are references to wiring methods in 230.30 and 230.43 since those wiring methods are for similar conductors on the supply side of a service disconnect.
The output rating limit is expressed as the sum of continuous currents from the various non-controlledpower production sources. Sources that comply with the new 705.13 can be curtailed based on theampacity of the service conductors and could be completely shut down if the non-controlled sourcesbegan to approach the ampacity of the service conductors.
The point of connection section, 705.12, has been divided into two sections. 705.12(A) has been moved to 705.11, Supply Side Source Connections and 705.12(B) has become 705.12 with the new title "Load Side Source Connections."
The language in 705.12(A) is preserved in the charging paragraph with the reference to 230.82(6). The overcurrent requirements are revised and moved from 705.12(A) into 705.11(A), Output Rating. Rather than limiting the sum of all overcurrent devices connected to power production sources, the limitation is the ampacity of the service conductors.
Section 705.11(B) sets a minimum conductor size of 6 AWG copper and 4 AWG aluminum for connections on the supply side of the service disconnecting means. The references to 230.30 and 230.43 are intended to limit the allowed wiring methods to the same methods allowed for service conductors on the supply side of the service disconnect.
Section 705.11(C) sets forth the requirements for overcurrent protection of the power source output conductors. This section also states that the overcurrent protection be located in a readily accessible location either outside of a building or at the first point of entry. If the service is inside a building, two options are available for the location of overcurrent protection. These options come from 705.31 expanding the distance from to 5m for the distance to an overcurrent device without current limiters and further limits the furthest distance allowed for installations with current limiters to 20m.
Section 705.11(D) deals with the grounding and bonding of metal equipment associated with conductors connected on the supply side of the service disconnect. The equipment is to be bonded in a similar way as service equipment. The primary difference in how it is connected to the grounding electrode system depends on whether or not a grounded conductor is brought to the power source disconnect. The size of the bonding conductor is based on the size of the power source output circuit conductors and not on the size of the service conductors.
Section 705.11(E) covers the type of connections that are permitted for conductors. The connections must be made with listed connectors. The last sentence clarifies that modifications to existing equipment must be covered in the manufacturer’s instructions or get a field evaluation and label to certify the connection. The informational note under (E) was added to clarify that supply side installation should not cross into the utility owned equipment.
Section 705.11(F) clarifies that a power source disconnecting means does not count toward the maximum of six disconnects discussed in 230.71 and is not required to be grouped in accordance 230.72. The disconnect must comply with 705.20 as it will often be the source disconnect.
In 705.11(G), a reference to 230.95 was added since the requirements of 230.95 address failures on systems above 150V to ground due to ground faults. These were due to relatively slow clearing times for ground-fault current. The same hazard exists for connections to the supply side of a service.