Support and securing on the Texas exam, and the two distances every item is built from

What the exam asks about it

Support reaches a Texas journeyman paper from two directions at once. In our 500 question bank, 51 items sit in the conduit and raceway area, and three of those turn on support: one counts the supports on a run of tubing, one names support spacing as the one thing on a list with no bearing on a conduit fill problem, and one asks what an added pull point changes and puts the distance to each new termination on that list.

Six more sit in the wiring methods area. They ask whether an installation complies when the interval is met and the first fastener after the box sits too far out, what the cable articles say about a staple driven hard enough to flatten a jacket, which cable assemblies may be fastened across the bottom of floor joists, and what a box has to be before it can be the only thing holding up a ceiling paddle fan.

That spread is why support pays. Electrical wiring methods and materials carries 10 of the 56 scored items on the journeyman knowledge portion, tied for the heaviest single area, and securing and supporting is a section every method article carries.

The item that counts supports

The arithmetic version reads like a field problem. A horizontal run of tubing goes 46 feet between two boxes, the raceway has to be secured within 3 feet of each box and supported at intervals no greater than 10 feet, and the question asks for the smallest number of supports. Five is the answer, and you get there by working from the ends inward.

Put one support at 3 feet from the first box and one at 43 feet, which is 3 feet from the second. That leaves 40 feet between those two. At a maximum spacing of 10 feet, the gap takes four intervals, which means three supports inside it, at 13 feet, 23 feet and 33 feet. Two end supports and three intermediate ones come to five.

Every wrong answer comes from collapsing the two requirements into one. Dividing 46 by 10 and rounding gives four, the option waiting for a candidate who read the interval and stopped. Six comes from starting the interval count at the box itself, and seven from working the interval as though it were shorter than the stem says.

Two distances, two surfaces

Each method article states an interval measured along the run and a separate distance measured from a box, cabinet, conduit body, fitting or other termination. The two answer different questions, and both figures usually sit in the same section, which makes them easy to drop into one list of options.

One bank item is built entirely on the gap between them. A run of tubing is fastened at even intervals that satisfy the article, and the first fastening after the box sits farther out than the article allows. The installation violates the section with the interval met, because meeting the interval says nothing about the last few feet. The termination figure exists for a mechanical reason: everything that pulls or sags transfers into the connector at the enclosure, and the connector is the part that fails.

What changes the number

The distance belongs to the method and to the circumstances together. Five things shift it, and a stem that mentions any of them is telling you which sentence to read.

• Trade size. For some raceway types the permitted spacing widens as the raceway gets bigger, so the section is a small table. For others one figure covers every size.
• Exposed or concealed work. Several articles treat a run behind a finished surface differently from one on a wall.
• Fished into finished construction. The classic reason securing is relaxed, since the fastener cannot be reached once the wall is closed.
• Through framing. In other than vertical runs, cable pulled through bored holes in wood members counts as supported and secured where the holes stay inside the article's interval and the cable is fastened near each box, under NEC 334.30. A stem describing joists describes a compliant run as often as a missing strap.
• A vertical run. Holding the raceway up is one question. Supporting the conductors inside a tall vertical raceway is a separate section, answered by conductor size and material, so a stem naming conductor size in a riser has moved you out of the strap question. Our page on conductor sizing and ampacity covers that side.

The relaxations decide more items

Method articles carry sentences that suspend securing under stated conditions, and they come in two shapes. Some are length limited: a run from the last point of support to a luminaire or other equipment inside an accessible ceiling may go unsecured up to a stated distance, and Article 334 writes one for nonmetallic sheathed cable while the metal clad and armored cable articles write their own figures. Others are condition only: cable fished between access points through concealed spaces in finished construction, where fastening is impracticable, goes unsecured on the strength of the arrangement.

The technique that follows is specific. An option saying the installation fails to comply is often wrong precisely because a relaxation covers the arrangement described, so a stem mentioning finished construction, an existing wall or a short run to a luminaire is a signal to go find the relaxation first.

The reverse trap is real too. Where a relaxation states a length, an item built to exceed it by a foot looks identical to one built to sit inside it, so a distance printed in the stem is there to be used. The knowledge portion gives you about 2.2 minutes an item.

What the code declines to accept

NEC 300.13 carries the general obligation to secure and support wiring methods, along with a short list of things that fail as a means of support. Those prohibitions are as testable as any distance and far quicker to read, which makes them cheap marks for anybody who has read them once.

• The wires holding up a suspended ceiling grid. Wires installed in addition to the grid wires, secured at both ends and put there for this purpose, are a different thing and are allowed.
• The ceiling assembly itself, where the wiring sits in the cavity of a floor-ceiling or roof-ceiling assembly.
• Another raceway, outside the cases the section names.
• A cable, as a means of support for other cables, for raceways, or for nonelectrical equipment.

Read the sentence about independent support wires closely, because a scenario describes grid wires and purpose installed wires in language that sounds like either one. The tell is whether the wires were added for this job and secured at both ends.

A numbering warning goes with it. Article 300 was reworked for the 2026 edition, and the general securing and supporting material sits at NEC 300.13 in the current book while the 2023 book carried it elsewhere in the article. Find it by its title in the article contents.

The box article holds support items

A large share of support items sit in Article 314, where support becomes a question about weight and listing. NEC 314.27 handles luminaires and ceiling suspended paddle fans with different limits, marking some cases by what the box is listed for.

The bank item describes an outlet box that will be the only thing holding up a ceiling suspended paddle fan, and the answer is a box listed and marked by the manufacturer as suitable for that purpose. Being the sole support is the condition that switches the rule on, so a box with a fan mounted near it sits outside the sentence while a box carrying the fan by itself sits inside it. Each distractor is a real idea in the wrong place: fastening the box to a structural member, choosing a box of a stated minimum volume, or fitting a plaster ring rated for the load. Volume is a fill question, which our page on box fill works through, and it says nothing about carrying weight.

NEC 314.23 sits alongside it, capping how large an enclosure may be when the raceways entering it are the only thing holding it up and naming the short list of enclosures a single conduit may support, a list that grew in the 2026 edition. A support rule living in the box article is a support rule candidates skip, and boxes and conduit bodies carries more of it.

The fastener, and a 2026 change

One 2026 change here is a listing requirement in place of a distance. The cable articles now reach the hardware itself, so cable ties, staples, straps and hangers used to secure or support the cable are listed products identified for that use. An item describing what the fastener is, with no distance anywhere in the stem, is asking about that sentence.

The manner of fastening has always been part of the rule. A bank item describes a cable secured with staples driven hard enough to flatten the jacket, and the answer is the plain requirement that fasteners are installed so as to avoid damage to the cable. The wrong answers offer a threshold that sounds sensible, such as allowing the flattening while no conductor shows. Crushed insulation is the damage the paragraph is written about, and it leaves a place for a fault to start where nobody will see it again.

On the job this is the failure that costs twice, since a run stapled tight passes a walk through until an inspector pulls on one, and correcting it means opening finished work.

What to do before test day

Under the clock, run the same steps every time. Name the wiring method, since the article follows from it. Find the section titled for securing and supporting. Read both distances and note the surfaces each is measured between. Check the scenario for a condition that changes the figure, such as trade size, fished or concealed work, a run through framing, or a short length to a luminaire. Then compare against the options.

Away from the book, work the counting problem above with different lengths until working from the ends inward is automatic, and read one method article's securing section end to end so the layout stops being a surprise.

This work lands on the licensing side of your file as well, since the hours you log toward the journeyman license are attested by the licensee who supervised the work, and that licensee attests only to training within their own knowledge under 16 TAC 73.26. Our page on documenting hours covers the rest.

The worked distances, article by article, live in the question set, where the arithmetic is shown step by step. The thirty free timed questions here mix support items in with the rest of the conduit area.

Questions people ask

How many supports does a 46 foot raceway run need?

Five, on the figures the bank item gives, where the raceway is secured within 3 feet of each box and supported at intervals no greater than 10 feet. Work from the ends inward: a support at 3 feet and another at 43 feet satisfy the termination distance at both boxes, leaving 40 feet between them, and 40 feet at a 10 foot maximum takes four intervals, so three supports go inside at 13, 23 and 33 feet. Dividing 46 by 10 gives four and misses that the termination distance is a separate obligation from the interval.

What is the difference between securing and supporting?

Securing means fastening the wiring method so it stays where you put it. Supporting means carrying its weight. A conduit lying in open hangers on a trapeze is supported while nothing stops it sliding along them, so that run has one obligation satisfied and one outstanding. On a job site a single strap usually does both jobs at once, which is why the distinction goes unnoticed in the field and decides items on paper. A scenario asking whether an installation complies is usually asking which of the two obligations went missing.

Where does the Texas exam get support distances from?

From the article for the wiring method in front of you. NEC 300.13 carries the general obligation and the list of things that fail as a means of support, and the distances themselves live in each method article, which makes every support item a two step lookup. A candidate who tabbed Article 300 and stopped there stalls on the second step. Article 300 was reworked for the 2026 edition, so find the securing and supporting material by its title in the article contents when your tabs came off the 2023 book.

Can cable be supported by ceiling grid wires?

The wires holding up a suspended ceiling grid fail as a means of support under NEC 300.13. Wires installed in addition to the grid wires, secured at both ends and put there for this purpose, are a separate thing and are permitted. A scenario will describe both kinds in language that sounds alike from a ladder, so the fact to look for in the stem is whether the wires were added for this job and secured at both ends. The same list rules out the ceiling assembly itself and a cable used to support other cables, raceways or nonelectrical equipment.

Does a box need to be listed to hold a ceiling fan?

Where the box is the only thing holding the fan up, yes. NEC 314.27 asks for a box listed and marked by the manufacturer as suitable for that purpose, and the marking is where the weight it is good for comes from. Being the sole support is the condition that switches the rule on, so a fan supported independently of the box sits outside that sentence. Fastening an ordinary box to a structural member does not convert it, and box volume answers a fill question and says nothing about carrying weight.

What changed about support in the 2026 code?

Two things a Texas candidate will meet. The cable articles now carry a listing requirement for the hardware, so cable ties, staples, straps and hangers used to secure or support the cable are listed products identified for that use. And Article 300 was reworked, which moved the general securing and supporting material to NEC 300.13 and pushed other Article 300 sections down two places. The list of enclosures a single conduit may support, at NEC 314.23, grew in the same edition. Texas adopted the 2026 book effective 1 September 2026 under 16 TAC 73.100.