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Black 18 AWG test lead wire roll, 50 ft silicone insulation

Value Brand

Value Brand 18 AWG 50 ft Test Lead Wire Black

SKU CH-5HER-12RPA

Black 18 AWG silicone-insulated test lead wire on a 50 ft roll, rated 33 V AC/70 V DC and 20 A up to 302 °F

  • Product typeDigital Multimeters
  • 50 ft roll gives long reach for bench work
  • 18 AWG silicone insulation handles 302 °F heat
  • 65×36 tinned copper strands stay flexible
  • Rated 20 A at 33 V AC / 70 V DC
  • 144 in diameter fits standard probes

Test Lead Wire 18 AWG 50 ft

This roll of 18 AWG test lead wire measures 50 ft and is finished in black. It is intended for technicians and hobbyists who need flexible leads for low-voltage bench or automotive measurements. The silicone insulation remains pliable across a wide temperature range. The wire is rated for a maximum of 33 V AC and 70 V DC.

Thermals and Electrical Limits

The conductor uses 65 strands of 36 AWG tinned copper giving a nominal outside diameter of .144 in. It carries up to 20 A and is rated for a maximum operating temperature of 302 degrees F. Under normal low-voltage use the wire runs cool and the silicone jacket resists heat without stiffening. No forced cooling or special routing is required for typical test currents.

Replaces Stiff PVC Test Leads

This roll replaces stiff PVC-insulated leads that crack in cold weather or melt near hot components. The upgrade is worth it when you need leads that stay flexible at high temperature and survive repeated bending. It is not suited for mains-voltage work or permanent installations that require higher voltage ratings.

How it compares

Measured against everything we stock in Meters, Testers & Measuring Tools, at today’s prices. Recalculated every night.

Price $30.99
Cheaper than about 65% of the 3,030 comparable items (median $54.99).

Specifications

Product
Brand nameZoro Select
Product typeDigital Multimeters

Questions about this item

How do I strip the silicone insulation on the 18 AWG wire without nicking the 65-strand tinned copper conductor?

Use a precision stripper set for 18 AWG or a sharp blade with a light touch; the 0.144 in outside diameter leaves little margin, so score the silicone gently and pull rather than twist to avoid cutting the fine 36 AWG strands.

When should I replace this 50 ft test lead roll if the silicone insulation degrades?

Replace the roll if the silicone becomes brittle, cracked, or sticky, or if the tinned copper strands show corrosion, since the insulation is rated to 302 °F and damage compromises the 33 V AC / 70 V DC and 20 A ratings.

What is the first limit reached when running 20 A continuously through this 18 AWG lead?

The 20 A maximum current rating is the primary limit; sustained loads at that level will heat the 65-strand tinned copper conductor toward the 302 °F insulation ceiling, so derate for long runs or high ambient temperatures.

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