Code HunterRead the article: CODE HUNTER — Health Care Facilities, 2017 NEC
To play this game, you need a sharp eye, a quick mind and a 2017 National Electrical Code book.
(Fill-in-the-blank questions are looking for the exact word(s) used in the NEC.)
1) __________. The person or persons who have the overall legal responsibility for the operation of a health care facility.
2) Critical care (__________) spaces shall be served only by a Type 1 essential electrical system.
3) It shall be permitted to control task illumination on the __________ branch.
4) __________. The hazard current of a given isolated system with all devices, including the line isolation monitor, connected.
5) Fuel cell systems shall be permitted to serve as the alternate source for all or part of a(n) __________ electrical system, …
6) The grounding terminals of __________ receptacles installed in branch circuits for patient care spaces shall be connected to an insulated equipment grounding conductor in accordance with 250.146(D) in addition to the equipment grounding conductor path required in 517.13(A).
7) The division between the branches shall occur at transfer switches where more than one __________ is required.
8) The life safety branch of the essential electrical system must always meet the requirements of Article 700, regardless of any rules found in Article 517.
9) Hospital power sources and alternate power sources are allowed to serve the essential electrical systems of facilities on the same site.
10) Wiring of the life safety branch and the critical branch is never permitted to occupy the same raceways, boxes, or cabinets of other circuits that are not part of the branch.
1) B, Governing body. This definition was added in 517.2 for the 2017 NEC. The term “governing body” is used in Article 517 and the definition matches that found in the 2015 NFPA 99 Health Care Facilities Code.
2) A, Category 1. This requirement is found in 517.29(B) and duplicates the requirement found in 220.127.116.11.10.1 of NFPA 99 Health Care Facilities Code. The use of Category 1, Category 2, etc. in the 2017 NEC is part of a transition to harmonize the location terminology in the NEC and NFPA 99.
3) A, Critical. Although allowed in the 2014 NEC, the permission to control task illumination on the critical branch was not specifically stated. This very specific language was added to 517.34(B) in the 2017 NEC to clarify that controlling task illumination on the critical branch is acceptable. The rationale for adding this language stated “This First Revision provides for patient comfort by allowing options to control luminaire systems. It now correlates with 2015 NFPA 99 language as general care areas are now considered critical care/general care (Category 1/Category2) spaces.”
4) D, Total hazard current. This language is found in two locations in 517.2. Under the definition of “Hazard Current” it is included as one of three sub-definitions (fault hazard current, monitor hazard current, and total hazard current). It is also found separately under “Total Hazard Current” with the exact same language in the definition. The other separate entries for the two sub-definitions refer the Code user back to the parent definition of “Hazard Current.”
5) C, Essential. This language is found in 517.30(B)(2). Fuel cell systems were added to the 2017 NEC as an alternate power source for the essential electrical system with six conditions: compliance with Article 692, a minimum number of required units, 10 seconds to assume loads, a continuous fuel supply with onsite storage, a portable diesel generator connection, and listing for emergency use.
6) D, Isolated ground. This language is found in 517.16(B)(1) and applies to isolated ground receptacles installed outside the patient care vicinity, but within a patient care space. The grounding terminals of the receptacle must be connected to an insulated equipment grounding conductor, and the equipment grounding conductor must be identified with green insulation with one or more yellow stripes. Isolated ground receptacles are prohibited inside patient care vicinities.
7) C, Transfer switch. This requirement was added in the 2017 NEC at 517.31(A). The language was extracted from 18.104.22.168.1.2 in NFPA 99 and applies when there is more than one required transfer switch. It clarifies the location for the separation of the three branches required in hospitals: life safety, critical and equipment.
8) B, False. The provisions of Article 700 apply to the life safety branch, except where amended by provisions in Article 517. This language is found in 517.26, and it clarifies that requirements found in Article 517 take precedence. One example is found in 517.31(B) and applies to facilities with a maximum demand on the essential electrical system of 150 kVA or less. For those systems, a single transfer switch is permitted for the entire system, which differs from the requirements in 700.5.
9) A, True. 517.31(B)(2) addresses facilities that are contiguous or located on the same site. It specifically allows the normal and alternate sources to supply the essential electrical systems for such facilities.
10) B, False. 517.31(C)(1) prohibits the wiring for the life safety and critical branches to occupy the same raceways, boxes or cabinets with other circuits that are not part of the branch unless it meets one of the following conditions: located in transfer equipment enclosures, in exit or emergency luminaires supplied from two sources, in a common junction box attached to such luminaires, or is for two or more circuits supplied from the same branch and the same transfer switch.