The Case
Employer: Not identified — composite enforcement pattern drawn from OSHA's published standard interpretation and recurring general industry citations under 29 CFR 1910.305 Location: General industry office environments (nationwide) Citation reference: OSHA Standard Interpretation, December 30, 2003 Penalty: Varies by inspection; daisy-chain findings are typically grouped under serious 1910.305 citations Standards cited: 29 CFR 1910.303(b)(2); 29 CFR 1910.305(a)(2)(iii)(B); 29 CFR 1910.305(g)(1)(iv) Outcome: Recurring fire and shock exposure; OSHA has formally interpreted daisy-chained relocatable power taps (RPTs) as a violation when used in place of fixed wiring.
We are not naming a single employer here because the most authoritative source on this hazard is OSHA's own 2003 Standard Interpretation letter, which compliance officers still rely on when writing citations today. The interpretation is clear: plugging one relocatable power tap into another, or using an RPT as a substitute for permanent receptacles, is not acceptable under the general industry electrical standards.
The pattern inspectors describe is almost always the same. A worker has two monitors, a laptop dock, a phone charger, a desk lamp, and — in summer — a personal fan or small AC unit. The cubicle has one duplex receptacle. To make it work, the worker plugs a six-outlet strip into the wall, then plugs a second strip into the first, then routes a third strip across the aisle to a coworker. By July, the branch circuit is carrying loads it was never designed for, the strip's internal breaker is warm to the touch, and the cord is pinched under a chair caster.
What fails is rarely the worker — it is the facility plan. Management did not provide enough fixed receptacles for the actual equipment load, did not inspect the spaces, and did not give staff a way to request more outlets. NFPA 1 Section 11.1.4 and OSHA 1910.305(g)(1)(iv) both treat RPTs as temporary devices for low-draw electronics, not as permanent building wiring.
What OSHA Found
- 29 CFR 1910.303(b)(2) — Listed equipment (the power strip) was not used in accordance with its listing instructions, which prohibit series connection. Typically cited as serious.
- 29 CFR 1910.305(a)(2)(iii)(B) — Flexible cords and cables used where run through holes in walls, ceilings, or floors, or used as a substitute for the fixed wiring of the structure.
- 29 CFR 1910.305(g)(1)(iv)(A) — Flexible cords used as a substitute for fixed wiring of the building. Typically cited as serious or repeat.
- 29 CFR 1910.305(g)(1)(iv)(C) — Cords run through doorways, windows, or similar openings where they can be damaged.
- OSHA Standard Interpretation (12/30/2003) — Confirms that daisy-chaining RPTs is prohibited and that RPTs may not be used as a substitute for permanent wiring.
- NFPA 1 Section 11.1.4 — RPTs must be directly connected to a permanent receptacle, must be listed, and may not be connected in series with other RPTs or extension cords.
What Should Have Happened
- Each RPT plugged directly into a permanent wall receptacle, never into another strip or extension cord — per 1910.305(g)(1)(iv).
- A facilities work order issued to add permanent receptacles wherever a strip is carrying more than light electronic load — per 1910.305(a)(2)(iii)(B).
- All strips bearing a current NRTL listing mark (UL, ETL, TÜV SÜD), and used only within their labeled ampere rating — per 1910.303(b)(2).
- High-draw summer appliances (fans, space heaters, mini-fridges, portable AC) plugged directly into wall outlets, never into an RPT — per NFPA 1 §11.1.4.
- A written office electrical policy that names the prohibited configurations and explains how to request an outlet without retaliation.
Lessons For Your Site This Week
We are applying the hierarchy of controls in order — elimination first, PPE last:
- Eliminate the daisy chain. If you find a strip plugged into a strip, unplug it today and tag the location for facilities.
- Substitute / engineer the fix. Permanent receptacles installed by a qualified electrician are the only durable answer for a workstation that needs more than four to six low-draw devices.
- Administrative controls. Publish a one-page office electrical policy. Add a quarterly under-desk walk to the facility checklist. Route fan and heater requests through a single email.
- PPE / last resort. There is no PPE that protects an office worker from a smoldering power strip — which is exactly why the upstream controls matter.
- Stop-work authority applies in offices too. If you smell hot plastic, see scorch marks on a receptacle, or feel a warm cord, you are authorized to unplug it and report it. No one will be disciplined for pulling a strip out of service. We will report back within one business day on the fix.
Action Steps
- Walk every workstation, breakroom, and copy area this week — confirm zero strip-into-strip, zero strip-into-extension-cord configurations.
- Verify every fan, heater, microwave, coffee maker, and mini-fridge is in a wall receptacle, not an RPT.
- Inspect every flexible cord for cuts, frays, missing ground pins, and pinch points under chairs and doors.
- Confirm each strip carries a current NRTL listing mark and is within its amp rating.
- Open a facilities ticket for any workstation where the legitimate equipment load exceeds available wall receptacles.
Two-way discussion prompts — bring these to your next huddle:
- Where in our space are people most likely to hide a daisy chain — and why did they feel they had to?
- What is the slowest part of our "I need another outlet" request process, and how do we shorten it?
Verification question (for the walker): Can you point to the wall receptacle that each power strip on this floor is plugged into, without finding a single strip-to-strip connection?
Comprehension check (for the team): Under 29 CFR 1910.305(g)(1)(iv), name two uses of a flexible cord that are prohibited, and explain why plugging a personal fan into a six-outlet strip in July is riskier than plugging in a laptop charger.
Close the loop: Findings from this week's walk go to facilities by Friday. We will publish what got fixed — and what is still open — in next Tuesday's huddle before the Independence Day shutdown.