Article 517 on the Texas journeyman exam, and the redundancy every item in it is built around

The sentence to walk in with

A branch circuit serving a patient care space carries two equipment grounding paths. NEC 517.13(A) puts the circuit in a metal raceway system, or in a cable whose metallic armor or sheath assembly itself qualifies as an equipment grounding conductor under NEC 250.118. NEC 517.13(B) then adds an insulated copper equipment grounding conductor installed with those same branch circuit conductors.

Under the general rules one qualifying path is the whole requirement. Here the metal is one path and the wire is the other, and both run together. An answer choice offering a metal raceway on its own, or an insulated conductor pulled through nonmetallic raceway, describes an installation that would pass in an office and falls short here.

The reason sits in the patient. Ordinary electrical safety leans hard on the resistance of dry skin, and a catheter or an incision goes straight past it, so current that would be imperceptible through a hand matters a great deal arriving near the heart. Elsewhere the design question is whether the fault path clears a fault before somebody gets hurt. Here it is whether a voltage difference can appear at all between two metal surfaces near a patient already connected to one of them.

One detail in the 2026 wording of 517.13(A) earns a mark in the margin: the metal path takes in the boxes and fittings along the run, alongside the raceway or cable between them.

How the bank tests this

Five of the 500 items in our bank touch Article 517, and the distribution tells you something before you read one of them. Four sit in the wiring methods and installations area. The fifth is filed under grounding and bonding, because the redundancy item reads as a grounding question and gets studied with the grounding material.

Three of the five are graded at the top of the difficulty scale, a heavier skew than the bank carries overall. These are the items candidates guess at, and the guessing is why they are worth an hour. The five shapes, in the order you would meet them:

• The redundancy itself. Wrong answers offer a grounding electrode dedicated to the room, isolated neutral conductors, and conductors of double the ampacity. The note on the electrode option is the one to read twice, since an electrode clears no faults whatever it is bonded to.
• The scope. A dental office being fitted out in a strip center, with wrong answers built on the article being a list of building types.
• The essential electrical system. Utility power fails and the question is what the equipment branch is permitted to do.
• Ground fault protection. A hospital service large enough to require it at the disconnect, and what NEC 517.17 adds downstream.
• X-ray supply sizing, the one calculation-flavored item in the group.

Notice what is missing. Nothing asks you to design a hospital, and every one of the five is answered by finding the right part of one article.

Scope follows the activity

The article follows the treatment of patients, so a dental office in a strip center sits inside it and the administrative wing of a hospital sits outside. That is the first move on any Article 517 item, and the bank's wrong answers are built on the opposite habit: reading the article as a list of building types.

Once the article applies, the patient care space category decides how much of it reaches a given room. The four categories run from a failure of equipment or a system likely to cause major injury or death down to one with no physical impact on patient care. They say nothing about power, and the injury in question can land on staff or a visitor as readily as on a patient.

Two places to look them up. All four definitions sit in Article 100 alongside patient care space, patient care vicinity and wet procedure location, which catches readers of older books who hunt at the front of Article 517. NEC 517.10(B) lists what Part II leaves alone, and a space outside Part II never reaches the grounding rules at all.

Three words carry the second path

Insulated. Copper. Installed with the branch circuit conductors. Each word has been the whole answer on an item, and a stripped-down version of the sentence is easy to spot in a distractor once you have read the real one carefully.

Insulated rules out a bare conductor. Copper rules out aluminum, which the code accepts in plenty of other places and declines here. Installed with the branch circuit conductors puts it inside the same raceway or cable as the circuit it protects, so a conductor run by another route falls outside the requirement.

Where it lands is worth reading too. NEC 517.13(B) takes the conductor to the grounding terminals of receptacles other than isolated ground receptacles, and to exposed metal on fixed equipment that could become energized, that somebody could touch, and that operates at over 100 volts. The voltage qualifier sits on the equipment and never on the receptacles. The section also carries exceptions turning on particular equipment, so mark where they sit and read them when one comes up.

The first path has a lookup of its own. The wording asks for a raceway system, or a cable armor or sheath assembly, that qualifies as an equipment grounding conductor in its own right, and the list at NEC 250.118 settles that. Some metal-sheathed assemblies are on the list and some are absent from it, so a question naming a cable type in a hospital is two lookups, and what qualifies as an equipment grounding conductor is the second.

Wet procedure locations offer a choice

NEC 517.20(A) calls for special protection against electric shock in a wet procedure location by one of two means. An isolated power system that stays in operation through a single line-to-ground fault, because it holds the first-fault current down to a low value. Or a supply that opens when ground-fault current exceeds the trip value of a Class A ground-fault circuit interrupter.

The words one of the following sit in that section on purpose. They were added for the 2023 edition to stop the two means being read as a stack, and the 2026 edition keeps them. An item offering isolated power and GFCI protection together is offering a distractor, and a convincing one, since a designer may well choose both.

Isolated power carries requirements of its own. NEC 517.20(B) sends you to NEC 517.160 for equipment listed as isolated power equipment, and NEC 517.160(B) calls for a listed, continually operating line isolation monitor on each system. That monitor is the point of the technique, since it reports a first fault and lets the procedure finish while the circuit stays up.

One 2026 addition is worth carrying. Where GFCI protection is the means chosen in an operating room, NEC 517.20(A) wants each receptacle to be an individual device or individually protected by its own, so the protection gets counted per receptacle. Read the Article 100 definition of a wet procedure location before answering anything here, since the everyday sense of a wet room sits a long way from the code's test.

The essential system in outline

NEC 517.29 describes a hospital Type 1 essential electrical system as three separate branches: life safety, critical and equipment. On a journeyman paper you are unlikely to need more than that.

The branches do all arrive, and they arrive at different times. The life safety and critical branches get a short interval, because they carry egress lighting, alarms and the equipment keeping patients alive. The equipment branch, which picks up heating, ventilation and similar loads, is permitted to be connected after a delay and in sequence, so the alternate source takes the hospital on in stages. The wrong answers in the bank give the equipment branch the life safety interval, put it ahead of the life safety branch, and drop it from the system entirely.

Ground fault protection has its own wrinkle at NEC 517.17. Where the service disconnect requires it, the article adds a second level on the feeders downstream and requires the two levels to be selective, so a ground fault on one feeder drops that feeder and leaves the hospital up. What the section leaves out is the part people forget, and the bank builds a wrong answer on it. The same thinking runs through emergency and standby systems.

Two counts worth memorizing

Almost everything in this article is a lookup, and two figures are cheap enough to carry. NEC 517.18(B) sets a minimum of eight receptacles at a patient bed location in a Category 2 space, and NEC 517.19(B) sets 14 in a Category 1 space. Both attach to the category, so getting the category wrong makes the count irrelevant.

X-ray sizing is the other figure-shaped item, and it works differently from everything a candidate has practiced. Part V sizes X-ray supply conductors and their protection against two ratings at once, a stated share of the momentary demand rating and the whole of the long time rating, with the larger result governing, and the disconnecting means follows the same two ratings. Treating the momentary figure as an ordinary continuous load oversizes the installation, and ignoring it starves equipment drawing a brief heavy current.

One caution about a section number on this page. NEC 517.7, covering patient care space risk categories and the risk assessment, is new for the 2026 edition, and our source for it is the panel draft output, with no printed page behind it yet. Confirm the number in your own copy before you rely on it. The matching question set works the same subject from the code side, with the section text and the worked arithmetic, at the health care question set.

What a Texas candidate should do

Texas adopts the 2026 National Electrical Code effective 1 September 2026 under 16 TAC 73.100, and the examinations reference that edition from the same day, so tab the 2026 book. NEC 517.7 exists only in that edition, and the risk assessment framework it brings into the code sits behind every category question on the paper.

Article 517 is a Chapter 5 article, and NEC 90.3 is the rule letting a Chapter 5 article demand something the general chapters never asked for. That rule widened this cycle, and the chapter titles moved from special to specific at the same time, while the published Texas subject outline keeps the older word. You will meet both vocabularies and one of them is in the book you are searching.

Four moves with the book open. Read the definitions in Article 100 first, since patient care space, the four categories, patient care vicinity and wet procedure location all live there. Read NEC 517.13 in place, once, slowly, because both paths sit in one short section. Put a tab on the exceptions under 517.13(B) and another on 517.20. Then read far enough into the article to see where Part II stops, which is the fastest way to answer a scope item.

Questions people ask

Why do patient care spaces need two equipment grounding paths?

Because a patient can be connected to equipment offering a low-resistance path into the body, so the fault path is never allowed to depend on a single thing. NEC 517.13(A) puts the branch circuit in a metal raceway system, or in a cable whose armor or sheath assembly qualifies as an equipment grounding conductor under NEC 250.118, and 517.13(B) adds an insulated copper equipment grounding conductor installed with the same branch circuit conductors. A loose locknut, a corroded fitting or a raceway pulled apart during a renovation takes out one path and leaves the other carrying a fault back to the panel.

Does Article 517 apply to a dental office?

Yes. The scope follows the treatment of patients, so the sign on the building settles nothing. A dental office fitted out in a strip center sits inside the article, and the administrative wing of a hospital sits outside it. The bank builds wrong answers on the opposite habit, offering the article as a list of building types or narrowing it to places where general anesthesia is given. Once the article applies, the patient care space category decides how much of it reaches a given room, and NEC 517.10(B) lists what Part II leaves alone.

Is GFCI protection required on top of isolated power in a wet procedure location?

No. NEC 517.20(A) asks for special protection by one of two means, and the phrase one of the following was added in the 2023 cycle to stop the two being read as a stack. The 2026 edition keeps it. The choices are an isolated power system that stays in operation through a single line-to-ground fault, or a supply that opens when ground-fault current exceeds the trip value of a Class A device. A designer may well specify both, which is what makes the combined option such a convincing distractor on an exam item.

How many Texas journeyman exam questions cover health care?

Very few, and that is the argument for studying it. Special Occupancies, Equipment, and Conditions carries 6 of the 56 scored items on the journeyman NEC Knowledge portion and 3 of the 24 scored on Calculations, per the PSI candidate bulletin updated 9 July 2026, and Article 517 shares that allocation with hazardous locations, pools, marinas and the rest of Chapter 5. In our own 500-question bank, five items touch Article 517 and three of those are graded at the top of the difficulty scale, which is where candidates guess.

What does the equipment branch do when utility power fails at a hospital?

It connects after a delay and in sequence with other loads. NEC 517.29 describes a hospital Type 1 essential electrical system as three branches, life safety, critical and equipment. The life safety and critical branches get a short interval because they carry egress lighting, alarms and the equipment keeping patients alive. The equipment branch picks up heating, ventilation and similar loads, and delaying it keeps the alternate source from being asked to take the whole hospital in one step. Bank distractors give the equipment branch the life safety interval or put it first in line.