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.

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Extech CT20 Remote and Local Continuity Tester with Remote Probe

Extech CT20 Remote and Local Continuity Tester with Remote Probe

Product ID: 2175252

Details

Brand
Extech
Color
green
Item Weight
0.1 kg
Power Source
Battery
Style
CT20

📏Tests cables up to 10,000 ft

🔊85dB loud audible beeper

🛠️Rugged, field-ready design

Bs.1924

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Description

🔌 Stay connected, stay ahead — test like a pro with Extech CT20!

ONE PERSON CABLE MASTERY - Detachable remote probe lets you trace and label wires solo across long distances—no assistant needed.
VERSATILE PRO GRADE TOOL - Ideal for electricians, installers, and DIY pros working on automotive, telecom, HVAC, and security wiring.
BUILT TOUGH FOR THE FIELD - Professional-grade alligator clips and rugged housing ensure reliable connections and durability on the job.
CLEAR SIGNALS IN ANY ENVIRONMENT - Bright LED flashes and a loud pulsating beeper cut through noise for instant continuity confirmation.
LONG DISTANCE TESTING POWERHOUSE - Effortlessly check wiring runs up to 3,000 meters, perfect for multi-room or building-wide projects.

The Extech CT20 Remote and Local Continuity Tester is a professional-grade, battery-powered ohmmeter designed for fast, reliable cable and wire continuity testing up to 10,000 feet. Featuring a detachable remote probe for one-person operation, bright LED and loud audible indicators, and rugged construction, it’s perfect for electricians and technicians handling complex wiring across large installations or remote locations.

Specifications

ASIN	B000LYTTRK
Best Sellers Rank	#140,934 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #200 in Multi Testers
Brand Name	Extech
Color	green
Customer Reviews	4.5 4.5 out of 5 stars (2,002)
Global Trade Identification Number	00793950000205
Included Components	Product & Instructions Guide
Item Dimensions	2.2 x 1.14 x 3.6 inches
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
UPC	013161042406 793950000205
Unit Count	1 Count
Upper Temperature Rating	149 °F
Warranty Description	1 year

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Bs.1924

Duties & taxes included

In stock

Sold byAmazon BoliviaDelivered 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 Bolivia.

Secure transaction

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