NCC 2022 Volume One - Building Code of Australia Class 2 to 9 buildings

J9

Part J9 Energy monitoring and on-site distributed energy resources

Part J9 Energy monitoring and on-site distributed energy resources

Introduction to this Part

This Part contains Deemed-to-Satisfy Provisions for compliance with Part J1. It sets out provisions that enable the monitoring of energy use (other than for billing purposes) and facilitate easy retrofit of renewable energy and electric vehicle charging equipment.

Notes

From 1 May 2023 to 30 September 2023 Section J of NCC 2019 Volume One Amendment 1 may apply instead of Section J of NCC 2022 Volume One. From 1 October 2023 Section J of NCC 2022 Volume One applies.

Notes: New South Wales Section J Energy Efficiency

  1. For a Class 2 building or a Class 4 part of a building, where a relevant development consent or an application for a complying development certificate requires compliance with a BASIX Single Dwelling or Multi Dwelling Certificate issued under Version 3.0 or earlier, NSW Section J of NCC 2019 Volume One Amendment 1 applies.
  2. For a Class 2 building or a Class 4 part of a building, where a relevant development consent or an application for a complying development certificate requires compliance with a BASIX Single Dwelling or Multi Dwelling Certificate issued under Version 4.0 or later, Section J of NCC 2022 Volume One applies.
  3. For a Class 2 building or a Class 4 part of a building, where a relevant development consent or an application for a complying development certificate requires compliance with a BASIX Alterations and Additions Certificate, NSW Section J of NCC 2019 Volume One Amendment 1 applies.
  4. For a Class 3 building or Class 5 to 9 building:
    1. From 1 May 2023 to 30 September 2023 NSW Section J of NCC 2019 Volume One Amendment 1 may apply instead of Section J of NCC 2022 Volume One.
    2. From 1 October 2023 Section J of NCC 2022 Volume One applies.

Notes: Tasmania Section J Energy Efficiency

In Tasmania, for a Class 2 building and Class 4 part of a building, Section J is replaced with Section J of BCA 2019 Amendment 1.

Deemed-to-Satisfy Provisions

(1) Where a Deemed-to-Satisfy Solution is proposed, Performance Requirements J1P1 to J1P4 are satisfied by complying with—

  1. J2D2; and
  2. J3D2 to J3D15; and
  3. J4D2 to J4D7; and
  4. J5D2 to J5D8; and
  5. J6D2 to J6D13; and
  6. J7D2 to J7D9; and
  7. J8D2 to J8D4; and
  8. J9D2 to J9D5.

NSW J9D1 Deemed-to-Satisfy Provisions2019: J8.0

Delete subclause J9D1(1) and insert J9D1(1) as follows:

(1) Where a Deemed-to-Satisfy Solution is proposed, Performance Requirements NSW J1P1 to NSW J1P7 are satisfied by complying with—

  1. NSW J2D2; and
  1. NSW J3D2 to J3D10; and
  2. NSW J4D2 to J4D7; and
  3. NSW J5D2 to J5D8; and
  4. NSW J6D2 to J6D13; and
  5. NSW J7D2 to J7D9; and
  6. J8D2 to NSW J8D4; and
  7. J9D2 to J9D5.

(2) Where a Performance Solution is proposed, the relevant Performance Requirements must be determined in accordance with A2G2(3) and A2G4(3) as applicable.

The Deemed-to-Satisfy Provisions of this Part do not apply—

  1. within a sole-occupancy unit of a Class 2 building or a Class 4 part of a building; or
  2. to a Class 8 electricity network substation.

(1) A building or sole-occupancy unit with a floor area of more than 500 m2 must have energy meters configured to record the time-of-use consumption of gas and electricity.

(2) A building with a floor area of more than 2 500 m2 must have energy meters configured to enable individual time-of-use energy data recording, in accordance with (3), of—

  1. air-conditioning plant including, where appropriate, heating plant, cooling plant and air handling fans; and
  2. artificial lighting; and
  3. appliance power; and
  4. central hot water supply; and
  5. internal transport devices including lifts, escalators and moving walkways where there is more than one serving the building; and
  6. on-site renewable energy equipment; and
  7. on-site electric vehicle charging equipment; and
  8. on-site battery systems; and
  9. other ancillary plant.

(3) Energy meters required by (2) must be interlinked by a communication system that collates the time-of-use energy data to a single interface monitoring system where it can be stored, analysed and reviewed.

(4) The provisions of (2) do not apply to energy meters serving—

  1. a Class 2 building where the total floor area of the common areas is less than 500 m2; or
  2. individual sole-occupancy units with a floor area of less than 2 500 m2.

(1) Subject to (2), a carpark associated with a Class 2, 3, 5, 6, 7b, 8 or 9 building must be provided with electrical distribution boards dedicated to electric vehicle charging—

  1. in accordance with Table J9D4 in each storey of the carpark; and
  2. labelled to indicate use for electric vehicle charging equipment.

(2) Electrical distribution boards dedicated to serving electric vehicle charging in a carpark must—

  1. be fitted with a charging control system with the ability to manage and schedule charging of electric vehicles in response to total building demand; and
  2. when associated with a Class 2 building, have capacity for each circuit to support an electric vehicle charger able to deliver a minimum of 12 kWh from 11:00 pm to 7:00 am daily; and
  3. when associated with a Class 5 to 9 building, have capacity for each circuit to support an electric vehicle charger able to deliver a minimum of 12 kWh from 9:00 am to 5:00 pm daily; and
  4. when associated with a Class 3 building, have capacity for each circuit to support an electric vehicle charger able to deliver a minimum of 48 kWh from 11:00 pm to 7:00 am daily; and
  5. be sized to support the future installation of a 7 kW (32 A) type 2 electric vehicle charger in—
    1. 100% of the car parking spaces associated with a Class 2 building; or
    2. 10% of car parking spaces associated with a Class 5 or 6 building; or
    3. 20% of car parking spaces associated with a Class 3, 7b, 8 or 9 building; and
  6. contain space of at least 36 mm width of DIN rail per outgoing circuit for individual sub-circuit electricity metering to record electricity use of electric vehicle charging equipment; and
  7. be labelled to indicate the use of the space required by (f) is for the future installation of metering equipment.

Limitations

J9D4 does not apply to a stand-alone Class 7a building.

Table J9D4 Electric vehicle distribution board requirement for each storey of a carpark
Carpark spaces per storey for electric vehicles Electrical distribution boards for electric vehicle charging per storey
0 - 9 0
10 - 24 1
25 - 48 2
49 - 72 3
73 - 96 4
97 - 120 5
121 - 144 6
145 - 168 7
Table Notes

Where there are more than 168 carpark spaces per storey, one additional distribution board must be provided for each additional 24 spaces or part thereof.

(1) The main electrical switchboard of a building must—

  1. contain at least two empty three-phase circuit breaker slots and four DIN rail spaces labelled to indicate the use of each space for—
    1. a solar photovoltaic system; and
    2. a battery system; and
  2. be sized to accommodate the installation of solar photovoltaic panels producing their maximum electrical output on at least 20% of the building roof area.

(2) At least 20% of the roof area of a building must be left clear for the installation of solar photovoltaic panels, except for buildings—

  1. with installed solar photovoltaic panels on—
    1. at least 20% of the roof area; or
    2. an equivalent generation capacity elsewhere on-site; or
  2. where 100% of the roof area is shaded for more than 70% of daylight hours; or
  3. with a roof area of not more than 55 m2; or
  4. where more than 50% of the roof area is used as a terrace, carpark, roof garden, roof light or the like.

Limitations

  1. The requirements of J9D5(1)(a)(i) and (b) do not apply to a building with solar photovoltaic panels installed on at least 20% of the roof area.
  2. The requirements of J9D5(1)(a)(ii) and (b) do not apply to a building with battery systems installed.