Can this device be used to test the continuity of a single conductor wire instead of a conductor pair?

I wondered about that too so I asked my son in law he's an electrician according to him you can't do it remotely but it can be done without the remote option as long as you can get to both ends of the single wire which makes this device useless in most cases because most of the wires I would want to remotely test are single wire

how many feet can be tested at one time ?

Not sure what your asking about how many feet? It is for finding continuous flow in wiring if your not sure which wire goes where. This is a video I used to help me to figure out a 4 way switch setup. http://www.thisoldhouse.com/toh/tv/ask-toh/video/0,,20785338,00.htmlHope it helps.

Hooking tester in panel box is a probl locating grnd and neg. Can you attach rem to grounding bar to test for neg and grounding wire continuity?

You can test everything you want as long as the object that you want to test is de-energized

do the units require any kind of recalibration or servicing to ensure it is still working correctly

No, none that I know of. It works fine and comes with instructions. It saves a lot of time and trouble, especially if you are working alone.

Extech Ct20 Remote And Local Continuity Tester With Remote Probe

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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COP 448592

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In stock

Sold byAmazon ColombiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔌 Trace it. Test it. Own it. The ultimate solo continuity tester for pros on the move.

VERSATILE ACROSS TRADES - Perfect for electricians, HVAC pros, telecom installers, and DIYers tackling home, automotive, or commercial wiring.
ONE PERSON CABLE MASTERY - Detachable remote probe lets you trace and label wires solo across massive distances—no assistant needed.
BUILT RUGGED FOR REAL WORK - Heavy-duty housing and professional alligator clips ensure secure, reliable connections on every job site.
CLEAR SIGNALS IN ANY ENVIRONMENT - Bright LED flashes and a loud pulsating beeper cut through noise and chaos for instant continuity confirmation.
TIME SAVING LONG DISTANCE TESTING - Effortlessly check wiring across rooms, floors, or entire buildings—speed up diagnostics and beat deadlines.

The Extech CT20 is a professional-grade continuity tester featuring a detachable remote probe for one-person operation up to 10,000 feet. It combines bright LED and loud audible indicators to ensure accurate cable testing in noisy environments. Ruggedly built with alligator clips and battery-powered portability, it’s ideal for electricians, installers, and maintenance technicians working on HVAC, telecom, automotive, and home wiring projects.

Specifications

Asin	B000LYTTRK
Best Sellers Rank	#183,690 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #257 in Multi Testers
Brand Name	Extech
Color	green
Customer Reviews	4.5 4.5 out of 5 stars (2,006) 4.5 out of 5 stars
Global Trade Identification Number	00793950000205
Included Components	Product & Instructions Guide
Item Dimensions	2.2 x 1.14 x 3.6 inches
Item Highlight	Detachable remote probe, one-person cable testing, LED and audible tone, alligator clips, HVAC/telecom
Item Weight	0.1 kg
Manufacturer	Extech
Measurement Type	Ohmmeter
Model	CT20
Number Of Items	1
Part Number	CT20
Power Source	Battery Powered
Style Name	CT20
Unit Count	1 Count
Upc	013161042406 793950000205
Upper Temperature Rating	149 °F
Warranty Description	1 year

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COP 448592

Duties & taxes included

In stock

Sold byAmazon ColombiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Colombia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Smooth transaction and product arrived in perfect condition.

3 weeks ago

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Extech CT20 Remote and Local Continuity Tester with Remote Probe

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Details

Description

Specifications

Common Questions