Public Meeting Notice  Electrical Interpretation Code Committee Meeting

527 CMR 12.00

Massachusetts Electrical Code Interpretation Code Committee

Agenda, September 16, 2025

Date:             September 16, 2025

Time:             1:00 p.m.

Location:       Microsoft Teams Meeting

Please be advised that recording meetings, by any means, including the use of any A.I. applications, without prior permission is strictly prohibited.

Microsoft Teams Meeting 

 Join on your computer, mobile app or room device

Click here to join the meeting

Meeting ID: 228 177 731 347 
Passcode: cWCe5U

Or call in (audio only)

+1 857-327-9245,,160763968#   United States, Boston

Phone Conference ID: 160 763 968#

1. Call to Order
2. Introductions
3. Agenda items:
   1. Review Meeting Minutes from May 20, 2025.
   2. Requests for interpretation:

527 CMR 12.00, submitted by Richard Shufro received June 30, 2025. 

Question #1: With respect to residential alarm systems with fire alarm devices.  Is it now correct to allow the system’s UL Class Two (plug in) power limited transformers to be placed into any branch 110 vt non switched outlet as long as the systems monitor the AC power with an indicator, and have back up power. 

Withdrawn by requestor. 

527 CMR 12.00,230.85(B)(3) submitted by Tony Alfano received July 10, 2025.         

Question #1: In the 2023 NEC as long as a breaker enclosure is marked as "suitable for use as service equipment" and NOT marked as "suitable only for use as service equipment" we are allowed to use this as an emergency disconnect. Are we allowed to run a 3 wire from this outdoor breaker enclosure to the indoor MSP with a main breaker that is the service disconnect where the grounds and neutrals will be bonded?

Question #2: Per the 2023 NEC, a breaker enclosure will be used as an emergency disconnect, not service equipment. It is marked as "suitable for use as service equipment." This will be installed on the supply side of the service disconnect. Can a 3 wire be run to the MSP?

527 CMR 12.00, 230(6) submitted by John Hathaway received July 24, 2025.

Question #1: When adding a PV system to a single/two family home, by means of a supply side tap, is the 1st PV disconnect in line considered a service disconnect under article 230.70?

527 CMR 12.00, 110.26 submitted by Aliaksei Kuahrenka received July 28, 2025.        

Question 1# Does 110.26 section allow water pipe to run vertically 0.5 inches away from the side edge of the electrical panel and 6 inches out from the panel cover?  When working on this panel, an electrician will have clear access to the front of the panel but may touch a water pipe with his forearm.

Question #2 110.26(A)(2) Can 14-inch-wide equipment be located at the very edge of the 30-inch min. width requirement, leaving 16 inches on the other side?

527 CMR 12.00, 314.15 submitted by Aliaksei Kuahrenka received July 28, 2025.        

Question #1 Does section 314.15 allow use of wire connectors that are not listed for damp or wet locations which are installed inside listed boxes in above-ground damp or wet locations?

527 CMR 12.00, 517.26, 700.10(D) submitted by James Silva received August 4, 2025.

Question #1 Where Art.517.26 says delete (2) from 700.10(D) Shall not apply. Does this Article only apply to the Life/Safety Branch of the Emergency System?

Question #2 In the MA Electrical Code Art. 700.10(D) Eliminates (D) 1 Occupancies. Does this deletion require all occupancies to provide 2hr fire protection to all feeder circuit wiring of the Emergency system which includes the Life/Safety, Critical and Equipment Branches?

Question #3 In the MA Electrical Code Art.700.10(D) eliminates (D)(1) Occupancies. Does this require ALL branches of the essential System to have 2hr Fire Protection of the feeder circuit wiring?

527 CMR 12.00, 110.26, 352.10(K), 705.10(K) submitted by Gustavo Silva received August 19, 2025.

Question #1 Per NEC 110.26 working space in front and under electrical equipment must comply with working space clearance?

Question #2 Per NEC 352.10(K) when PVC conduit is installed above sidewalk, it is considered subject to physical damage and therefore schedule 80 is required?

Question #3 Per NEC 705.10(K) A permanent plaque or directory shall include the contact information of system owner, operator, or maintenance provider, including a phone number?

4. Items not anticipated 
5. Adjournment