Tool and Cord Inspection Before a Job
Purpose
An electrician's own extension cord is the piece of equipment most likely to shock them, and it is the only one nobody treats as equipment. The gear the shop inspects on a schedule is the gear a standard names: gloves, meters, arc-rated clothing. Cords, tools and cord reels live in the truck bed, get run over, get pulled around a door frame, and get inspected when something stops working.
The failure has a shape. A cord's equipment grounding conductor opens somewhere inside the jacket, usually at a strain relief, and nothing changes: the tool still runs, the light still lights, the reel still spools. The tool now has no fault path, and the first insulation failure inside it energizes the case. Nothing in the day's work tells you this has happened. That is why the check is a test with an instrument and a schedule, not a look.
Scope
Covers portable cord-and-plug-connected tools, extension cord sets, cord reels, temporary lighting and the GFCI devices used with them, on residential and light commercial electrical work. Covers the before-use visual, the periodic continuity and polarity test, GFCI verification, and removal from service.
Does not cover the permanent wiring of the premises, temporary power distribution built as part of a job, which the temporary power setup and teardown SOP owns, or test instruments and their leads, which the test instrument verification SOP owns and which carry their own inspection duty.
Roles and responsibilities
| Role | Owns | Hands off |
|---|---|---|
| Shop owner or safety lead | The test schedule, the tag colours, replacement stock | Replaces a condemned cord the same week, since a shop short of cords is a shop that splices them |
| Technician | Steps 1 to 6 before use, on every shift the item comes out | Cuts the cap off a condemned cord before it goes back on the truck |
| Whoever runs the quarterly test | Steps 4 and 5 and the tag update | Records the test date against the item ID, not against "the box of cords" |
Anyone may condemn an item. A condemned cord leaves the site with its plug cut off, because that is the only removal from service that survives a busy morning.
Procedure
Establish which rule set the job falls under before you decide what the cords need. Acceptance: the ticket says general industry or construction. On construction the shop must run either GFCI protection on all 125 V, single-phase, 15, 20 and 30 A receptacle outlets that are not part of the permanent wiring, or a written assured equipment grounding conductor program, under 29 CFR 1926.404(b)(1). A service call in an occupied dwelling is general industry, where 29 CFR 1910.334(a) carries the pre-use inspection duty. Wrong looks like assuming every job is a service call because the truck is a service truck. Stop rule: if you cannot tell, take the construction requirements, which are the stricter set. Hazard: none at this step, it is a decision made before the truck is unloaded, which is where it belongs.
Visually inspect every cord set, tool cord, plug and cord reel before use on any shift. Acceptance: no cut, abrasion, crush, melt or heat discoloration in the jacket; no conductor or braid visible anywhere; no cracked or loose cap; no bent, missing or loose grounding pin; strain relief gripping the jacket rather than the conductors; no tape anywhere on the cord. This inspection is required by 29 CFR 1910.334(a)(2) in general industry and 29 CFR 1926.404(b)(1)(iii) on construction. Wrong looks like a taped nick the tech has been working around for a month. Stop rule: any of those condemns the item; electrical tape is not a repair on a flexible cord. Hazard: uncoiling a damaged cord while it is plugged in puts a hand on the damage while it is energized, so unplug first, then inspect, then plug in.
Check the tool itself, including the parts of it that are not electrical. Acceptance: housing uncracked, guards present and functioning, chuck or blade secure, trigger returns and does not stick, no burning smell, brushes not sparking excessively, and a double-insulated tool carries its square-within-a-square marking with a two-conductor cord and no grounding pin. Wrong looks like a grounding pin filed off a three-prong cap so it fits a two-slot receptacle. Stop rule: a missing grounding pin condemns the tool, and a cheater adapter is never the answer on a shop's own equipment. Hazard: a stuck trigger on a corded drill starts the tool the instant it is plugged in, so plug in with the tool set down and pointed away, not held.
Run the continuity and terminal tests on the schedule, with an instrument. Acceptance: continuity confirmed on the equipment grounding conductor end to end, and each receptacle and plug confirmed to have its equipment grounding conductor landed on the correct terminal, with no reversed conductors. Under 29 CFR 1926.404(b)(1)(iii) an assured grounding program runs these before first use, before return to service after repair, after any incident that could have caused damage, and at intervals not exceeding 3 months, except that fixed cord sets and receptacles not exposed to damage go to 6 months. Wrong looks like a reversed hot and neutral on a repaired cap, which powers a tool's switch loop through the neutral. Stop rule: a failed continuity test condemns the cord regardless of how it looks. Hazard: none at this step, it is a bench test on unplugged equipment, and doing it on a bench rather than in a crawlspace is the point.
Test every GFCI device before the tools go on it, using the device's own test button and a plug-in tester on the load side. Acceptance: the test button trips the device, the reset restores it, and a downstream plug-in GFCI tester also trips it. A portable GFCI plugged in and never tested is an assumption, not protection. Wrong looks like a device that resets but no longer trips, which is exactly what a worn GFCI does. Stop rule: a device that fails either test is condemned; there is no adjusting one. Hazard: the tester is applied to a live receptacle, so it goes in with dry hands and the tech is not standing in water while doing it, which on an outdoor call in the rain means finding a dry position first.
Tag what passed, cut what failed, and record it before the tools come out. Acceptance: passing items carry the current period's tape colour or tag, applied at the cap end where a tech sees it; condemned items have the cap physically cut off on site; and the register row carries the item ID, the test date and the result. Wrong looks like a bin of untagged cords where nobody can tell which were tested. Stop rule: an untagged cord is treated as untested and does not go in service until step 4 runs on it. Hazard: cutting a cap off a cord that is still plugged in is how this step injures someone, so unplug at the receptacle first, confirm the cord is loose in your hand, and cut on a hard surface away from the body.
The record this produces
One line per item in a register: item ID, type, length and gauge for cords, purchase date, last visual date, last continuity and terminal test date and result, GFCI test result where applicable, current tag colour, and any condemn event with the defect in words.
Also one line on the job ticket for construction work: which of the two options under 29 CFR 1926.404(b)(1) the job ran, GFCI protection or an assured grounding program. That is the line an inspector asks about, and it cannot be reconstructed later.
The owner reads the condemn column, because a cord type failing repeatedly is usually a gauge or jacket problem rather than a handling problem, and reads the interval column to catch items that have quietly slipped past 3 months. The lead tech reads the register before loading a truck for a construction job, since the tag colour on the truck has to match the current period.
One Monday morning, run
A five-item check before a small retail tenant fit-out, which is construction work: two 12 AWG cord sets at 50 ft, one cord reel, one corded hammer drill and one portable GFCI.
Step 1: the job is a fit-out, so 29 CFR 1926 applies. The shop runs GFCI protection rather than a written assured grounding program, which is the simpler of the two options for a crew this size. Written on the ticket.
Step 2: cord set A passes. Cord set B has a flattened, slightly glossy section about 8 ft from the female end where a wheel ran over it, jacket intact but deformed. Deformation without a visible conductor is not on step 2's condemn list, so it does not fail here; it goes forward to step 4 flagged. The reel passes. The drill's cord shows the jacket pulled roughly a quarter inch out of the strain relief at the tool end with the conductors visible. That is a step 2 condemn condition. Stop rule fires: the drill is out of service, and the cap is cut at step 6.
Step 3 on the drill does not run, because step 2 already condemned it. The reel and both cord sets carry no tool.
Step 4 on the two cord sets and the reel. Cord set A: continuity on the grounding conductor confirmed, terminals correct. Reel: same. Cord set B, the flagged one: the grounding conductor reads open. The jacket was intact and the failure was inside it, which is exactly the case step 2 cannot catch and step 4 exists for. Condemned.
Step 5: the portable GFCI trips on its own button, resets, and trips again on the plug-in tester at the load side. Passes.
Step 6: two condemned items, both caps cut on site, both rows closed with the defect in words, which reads "jacket withdrawn from strain relief, conductors exposed" and "equipment grounding conductor open, jacket intact." Three items tagged with the current quarter's colour.
Result: 5 items in, 2 condemned, 3 tagged into service. That is 3 of 5, 60 percent, and the crew is now one drill and one 50 ft cord short before the day starts, which is why the register's replacement column matters more than the pass rate.
Checking the run against step 4's acceptance: continuity and terminal placement were both reported for all three tested items, in the same terms the acceptance names, and the one failure is reported as a continuity result rather than as a general impression that the cord looked bad.
References
- 29 CFR 1910.334(a), use of portable cord- and plug-connected equipment in general industry, including the visual inspection before use on any shift and the removal of defective equipment from service.
- 29 CFR 1926.404(b)(1), ground-fault protection on construction sites: the GFCI option at (b)(1)(ii) and the assured equipment grounding conductor program at (b)(1)(iii), including its test triggers and the 3-month and 6-month intervals cited above.
- 29 CFR 1910.333(b)(2) for general-industry electrical work practices and 29 CFR 1926.417 on construction. 29 CFR 1910.147 excludes electrical utilization work at its own (a)(1)(ii)(C).
- Manufacturer instructions for each tool, which govern brush replacement, guard condition and the double-insulation marking.
- See related: the temporary power setup and teardown SOP, which owns job-built distribution; the test instrument verification SOP, which owns meters and their leads.