Box fill NEC 2017

Brandon002

Member
Location
Tennessee
Occupation
I want to be an electrician
If there was 3 #12 awg ground wire what would be the cubic inch? I’m under the impression you only count it once.

Thanks in advance


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Thank you i thought so cause there this 2017 flash card that has that exact question and the answer was 6.75 cubic inch


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They are correct if they weren't ground wires. 3 #12 =6.75 but not if they are equipment grounding conductor's. Make sure you read the card exactly as printed. Certainly can be a error.
 
Here is an AI post on Va law....I don't know how accurate it is but I suspect it is close

Here's how Virginia's energy code addresses electrical outlets:
  • Commercial Buildings: The 2021 International Energy Conservation Code (IECC) and ASHRAE 90.1-2019, incorporated into the USBC with an effective date of January 18, 2024, include provisions for automatic receptacle control in commercial buildings.
    • These controls mandate that at least 50% of the receptacles in enclosed offices, conference rooms, copy rooms, break rooms, classrooms, and individual workstations are controlled by devices that automatically turn off the power at specific times or based on occupancy detection.
    • Controlled receptacles must be clearly marked, and can be implemented as split receptacles or controlled duplexes located near uncontrolled receptacles.
  • Residential Buildings: The Virginia Residential Code, which aligns with the International Residential Code (IRC), requires air-sealing for electrical and communication boxes located within the building's thermal envelope. These boxes must meet NEMA OS 4 standards to limit air leakage, contributing to overall energy efficiency by preventing air infiltration and exfiltration.
  • Energy Efficiency Programs and Targets: Virginia's Clean Economy Act (VCEA), enacted in 2020, establishes energy savings requirements for electric utilities and encourages investments in energy efficiency programs. This legislation, while not directly mandating specific "energy-efficient outlets," promotes broader energy efficiency efforts that can encompass the use of controlled outlets and other energy-saving measures in homes and businesses.
In summary, while not enforcing specific "energy-efficient outlets" across the board, Virginia's building codes and energy efficiency regulations impact electrical outlets in the following ways:
  • Commercial buildings: Automatic receptacle controls are mandated in certain areas to reduce energy consumption.
  • Residential buildings: Air-sealed electrical boxes are required to enhance the thermal envelope and reduce energy loss.
  • Statewide initiatives: Energy efficiency programs and targets are in place to encourage broader energy savings, which may include the adoption of more efficient electrical components and practices.
 
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