Best power strip with a long cord: read the amp rating before the length

Updated 2026-11-09 · Pick: CRST 10-Outlet Heavy Duty Metal Surge Protector 2800J · Dealectric link: TESSAN PS07 2100J: $29.99 on tessan.com (checked 2026-11-07): https://dealectric.com/go/tessan-ps07-2100j-surge-protector-8-outlets-20w-usb-c

Short answer. The best long cord power strip for most rooms is the CRST 10-Outlet Heavy Duty surge protector: 15 ft cord, 2,800 J, rated 15 A / 1,875 W. Read the rating before the length: some 15 ft flat-cord surge protector strips stop at 1,250 W (10 A), a third less.

Searched as: best long cord power strip 15 ft 25 ft UL listed surge protector 2026

How this table was made: each figure comes from the maker's own US product page or manual, or from the reviewer named next to it, checked 2026-11-09. Dealectric does not test units itself. Rows with a Buy link are products Dealectric lists: the links are affiliate links, and their codes are re-tested in the brand's own cart every day (last check 2026-11-13).

What the differences mean

• Amps decide what a strip can run. 1,875 W ÷ 125 V = 15 A, the full capacity of an ordinary household circuit. 1,250 W ÷ 125 V = 10 A, which is 5 A less, or a third (5 ÷ 15 = 33%).
• 1,800 W and 1,875 W labels are the same strip size. Tripp Lite's 1,800 W is 15 A × 120 V, and CRST's, GoGreen's and TESSAN 1026's 1,875 W is 15 A × 125 V. Both are 15 A.
• A 25 ft 14 AWG cord loses little. The PS725B's cord has 50 ft of copper in the loop. 15.24 m × 8.2 Ω/km = 0.125 Ω, and 0.125 Ω × 15 A = 1.9 V, or 1.6% of 120 V, with 15² × 0.125 = 28 W of heat in the cord at full load.
• A 15 ft 14 AWG cord loses less. 9.14 m × 8.2 Ω/km = 0.075 Ω, and × 15 A = 1.1 V (0.9%), with about 17 W of heat at full load.
• A thinner 16 AWG cord at 25 ft would lose 15.24 m × 13 Ω/km × 15 A = 3.0 V (2.5%) and give off about 45 W. That is about 60% more than 14 AWG at the same length and current.
• Surge rating: 2,800 J ÷ 900 J = 3.1× more surge energy absorbed by the CRST 10-Outlet than by the TESSAN 1026.

Use	Fits
Garage, workshop or desk with monitors, printers and a TV; outlet 10–15 ft away	CRST 10-Outlet Heavy Duty, 15 ft version (15 A, 2,800 J). CRST sells it with a 6 ft or a 15 ft cord, so pick 15 ft at checkout.
More outlets on a 15 ft run, mounted under a bench	CRST 12-Outlet Metal 2100J (14 AWG SJT, 15 A)
Behind a bed or sofa, phones, tablets and laptops, light loads	TESSAN PS07 (flat plug, 2 USB-C with up to 20 W PD, up to 15 ft, 1,250 W) $29.99: https://dealectric.com/go/tessan-ps07-2100j-surge-protector-8-outlets-20w-usb-c
20–25 ft with surge protection and a flat plug	TESSAN 1026 (1,875 W, 900 J). TESSAN doesn't print the cord gauge, so keep heavy loads near the wall.
25 ft for lamps or tools where surge protection doesn't matter	Tripp Lite PS725B (14 AWG, 15 A breaker)

Read the rating label before the cord length

The cord length tells you how far a strip reaches. The rating tells you how much it can carry when it gets there. TESSAN's own range shows how far these differ within one brand. The 1026 is rated 1,875 W across 8 outlets with cords from 5 to 25 ft. The PS07 (5, 10 or 15 ft) and the 10 ft PS09 are rated 1,250 W, about 10 A. Those two have the higher joule figures (2,100 J and 1,050 J against 900 J), so joules and watts have to be read separately. CRST rates its 15 ft metal strips at 15 A / 125 V / 1,875 W, and its 12-outlet model names its cord: 14 AWG SJT.

Gauge is the second figure to check. Markertek and Target list the PS725B's 25 ft cord as 14 gauge, and Markertek gives the type as SJT. TechGearLab (Chris McNamara with Ian Nicholson, updated 2023-12-19) tested 10 strips, including the 15 ft CRST 10-Outlet Heavy Duty. It reported that every cord was at least 14 AWG and that all of them held around 120 V with several higher-draw devices plugged in. The CRST got the top cord-length score in that test, 9.0 out of 10.

Buy the length you need rather than extending a shorter strip. Tripp Lite's Power It! manual says not to use the strip with extension cords or adapters that eliminate the connection to ground, and not to connect it to an ungrounded outlet. It calls for a standard 3-wire grounded 120 V outlet, indoors only.

Not recommended

Tripp Lite PS725B as a surge protector. Its 25 ft 14 AWG cord and 15 A breaker are solid. But Target's spec sheet lists only the overload breaker and no joule rating, so it is a plain power strip. If the strip feeds a TV, computer or router, pick one with a joule rating, such as the CRST strips above, or the TESSAN 1026 if you need 25 ft.

Sources

• CRST 10-Outlet Heavy Duty: 2,800 J, 1,875 W at 125 V, ETL Listed, 6 or 15 ft cord, 18/36-month warranty, from $24.99 (read 2026-11-09) — www.crsttech.com
• CRST 12-Outlet Metal 2100J: 6/15 ft 14 AWG SJT cord, 15 A / 1,875 W, 2,100 J, price — www.crsttech.com
• GoGreen GG-16315-15: 15 ft, 15 A / 1,875 W breaker, 1,200 J, UL and cUL, price — www.globalindustrial.com
• TESSAN 1026: 5–25 ft cord, 1,875 W max, 900 J, 8 AC + 3 USB, price — www.tessan.com
• TESSAN PS07: 5/10/15 ft cord, 8 AC up to 1,250 W, 2,100 J, 2 USB-C with up to 20 W PD — tessan.com
• TESSAN PS09: 10 ft, 1,250 W, 1,050 J, price — www.tessan.com
• Tripp Lite PS725B: 14 AWG, 15 A breaker, 1,875 W peak, breaker as the only protection, Target price — www.target.com
• Tripp Lite PS725B: 25 ft 14 gauge SJT cord, 1,800 W output — markertek.com
• Copper resistance: 14 AWG 8.2 Ω/km, 16 AWG 13 Ω/km (voltage-drop arithmetic) — www.engineeringtoolbox.com
• Tripp Lite Power It! manual: no ground-eliminating extension cords or adapters, grounded 3-wire outlet, indoor use — www.manualsdir.com
• TechGearLab test: CRST 10-Outlet 15 ft cord-length score 9.0, all cords at least 14 AWG, around 120 V under load — www.techgearlab.com

Published 2026-11-09; updated 2026-11-09. The buy links are affiliate links; see the disclosure. Corrections welcome at [email protected] or /feedback.