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Red handheld AC clamp meter with jaw opening and LCD display

TENMARS ELECTRONICS

TENMARS ELECTRONICS TM-1017 400A True-RMS AC Clamp Meter electrician tool

SKU CH-H735-6R5S0 MPN TM-1017

Measures AC/DC voltage, AC current to 400 A, power, harmonics to the 25th and phase rotation on conductors up to 30 mm

  • Labor warranty1 Year
  • Product typeTest Equipment
  • Color and finishRed
  • Number of items1 pack
  • Sold asBox
  • Parts warranty3 Years
  • True-RMS AC measurement up to 400A for accurate non-contact current readings
  • Phase rotation detection identifies wiring sequence on three-phase systems
  • Harmonic analysis to the 25th order with THD reveals power-quality issues
  • CAT III 600V rating protects against transient over-voltages in distribution panels
  • Jaw opens to 30mm accommodating large conductors up to 30mm diameter

Professional AC clamp meter for electricians

The Tenmars TM-1017 is a True-RMS AC clamp meter rated at 400A with CAT III 600V safety. It measures AC and DC voltage, AC current, phase sequence and harmonics up to the 25th order with THD. The instrument also reads active, reactive and apparent power plus power factor on single and three-phase systems.

Jaw opens to 30 mm for standard conductors

The clamp jaw accepts conductors up to 30 mm diameter, covering most residential and light-commercial cables. Auto-ranging and data-hold simplify routine measurements while the audible continuity buzzer sounds below 40 Ω. The 4000-count display updates at 400 Hz maximum frequency and peak-hold captures transient spikes.

Three-phase power analysis up to 25th harmonic

The meter comfortably handles balanced and unbalanced three-phase loads, providing per-phase power, energy and cos ø readings. It runs out of headroom above 400 A AC or 600 V CAT III, so high-current feeders and CAT IV environments need a higher-rated instrument. Power comes from two AAA cells, not included.

How it compares

Measured against everything we stock in Electrical Trade Tools & Kits, at today’s prices. Recalculated every night.

Price $194.99
Pricier than about 77% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand nameTENMARS
Model nameTM-1017
Product typeTest Equipment
Color and finishRed
In the box
Number of items1 pack

Questions about this item

How do I confirm the TM-1017 is measuring correctly after setup?

Switch to a known AC voltage source or use the audible continuity test; the 4000-count display should show stable readings and the buzzer sounds below 40 Ω.

What comes in the box with the TM-1017 and what must I buy separately?

The meter ships in a single box; two 1.5 V AAA batteries are not included and must be purchased separately.

Which measurement capability should guide my choice of the TM-1017?

Choose this model for 400 A True-RMS AC current, phase rotation, harmonics to the 25th order with THD, and power factor on single or three-phase systems.

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