CQD Spotlight features questions and answers from NECA and ELECTRICAL CONTRACTOR’s Code Question of the Day program. Whether you’re a seasoned contractor, an apprentice or simply a National Electrical Code enthusiast, you’ll gain knowledge with a nod to the legacy of Charles M. “Charlie” Trout, a true NEC legend
From the archives—June 14, 2024
I am remodeling a building where an optometrist will be doing laser surgery for correcting vision, among other services they offer. Does the part of the building that will be part of the laser surgery need to meet the requirements of NEC Article 517?
This will come down to definitions. Article 100 defines a healthcare facility as “Buildings, portions of buildings, or mobile enclosures in which human medical, dental, psychiatric, nursing, obstetrical, or surgical care is provided.” Based on this definition, a building or portion of a building where laser eye surgery is performed would be considered a healthcare facility.
A patient care space is defined as any “space of a health care facility wherein patients are intended to be examined or treated.” Based on this definition, the space where laser eye surgery is performed also would be a patient care space.
The additional grounding and wiring method requirements in Section 517.13 apply to the wiring that serves patient care spaces, which here would include the space you will be working on.
From the archives—June 27, 2025
We’re roughing in some exam rooms at a medical clinic and got into a debate about whether they qualify as “patient care spaces.” There’s no surgery or major procedures, just physical exams and occasional IVs. Do we still need to follow the healthcare facility grounding rules?
Yes, exam rooms are classified as Category 3 Patient Care Spaces in Article 100. Per 517.13, wiring serving patient care spaces must comply with the redundant grounding requirement: one via the equipment grounding conductor and one through a conductive raceway or metallic armor. However, the metallic armor or raceway must itself qualify as an EGC in accordance with 250.118. So, MC cable is fine—but it must be the healthcare type with redundant paths.
From the archives—March 7, 2025
Are there requirements for electrical installations outside of the NEC, product listing and manufacturers’ instructions? For example, chapters 6 and 10 of NFPA 99, Health Care Facilities has electrical requirements. Hopefully, those always agree with NEC Article 517.
There are several other standards with requirements that will affect electric installations.Some examples of those standards include:
- International Building Code
- International Energy Conservation Code
- International Existing Building Code
- NFPA 20, Standard for the Installation of Stationary Pumps for Fire Protection
- NFPA 30A, Code for Motor Fuel Dispensing Facilities and Repair Garages
- NFPA 72, National Fire Alarm and Signaling Code
- NFPA 79, Electrical Standard for Industrial Machinery
- NFPA 90A, Standard for the Installation of Air-Conditioning and Ventilating Systems
- NFPA 101, Life Safety Code NFPA 110, Standard for Emergency and Standby Power Systems
- NFPA 111, Standard on Stored Electrical Energy Emergency and Standby Power Systems
- NFPA 780, Standard for the Installation of Lighting Protection Systems
From the archives—Aug. 4, 2022
Recently, there have been new rules added to Article 517 regarding the minimum number of receptacles required for an operating room in a healthcare facility. How many are now required, and does this apply to existing operating rooms that were in service before the change and continue to be in service?
You are correct in that there are now a minimum of 36 receptacles required for an operating room. See Section 517.19(C). As far as the second question, the NEC is generally not retroactive, in that those installations done in compliance with the latest editions are generally treated as existing and allowed to remain without having to upgrade to current NEC requirements.
However, it is always a good idea in cases like this to consult with both the authority having jurisdiction and the governing body of the healthcare facility for specific requirements that may be more restrictive than the NEC.
Get more out of this discussion through the CQD Spotlight podcast.
