Extech 382252 Earth Ground Resistance Tester Kit

Fits facility and substation earth-ground checks that need a 3-pole fall-of-potential kit with 20/200/2000 Ω ranges, AC earth voltage, and CAT III 1000 V listing — leads, auxiliary earth bars, holster, and case in one kit.

Key advantages

Earth ground ranges — Earth ground resistance 20/200/2000 Ω; AC earth voltage 0–200 VAC (50–400 Hz); DC voltage 0–1000 V; resistance 0–200 kΩ; continuity 40 Ω.
Accuracy — Earth ground ±(2% rdg + 2 d); earth voltage ±(3% rdg + 3 d); DC voltage ±(0.8% rdg + 3 d); resistance ±(1% rdg + 2 d) per Extech 382252 DS.
Kit contents — 3-pole earth ground resistance tester kit; E/P/C terminals with test leads and 2 auxiliary earth bars.
Power / form — 6 × 1.5 V AA batteries; Handheld with protective rubber holster and carrying case.
Approvals — CE; CAT III 1000 V; EN61010-1.

Typical applications

Building grounding electrode and ground-grid resistance checks (3-pole method).
AC earth voltage presence checks on the same instrument (0–200 VAC).
Service kits needing DC voltage and continuity alongside earth resistance.
Field work with rubber holster and carrying case for leads and earth bars.

Selection guide

Method — 3-pole earth ground; test current <2.5 mA at 820 Hz per OEM notes.
Ranges — Confirm 20/200/2000 Ω covers expected ground resistance; overrange indication on the dual display.
Environment — 0 to 40 °C (32 to 104 °F); RH 80% max (UM).
Safety — CE; CAT III 1000 V; EN61010-1 — match CAT rating to the measurement location.
Kit completeness — E/P/C leads + 2 auxiliary earth bars + holster + case; state if spare bars/leads are needed.

Common mistakes

Expecting clamp-on stakeless ground measurement — 382252 is a 3-pole kit with auxiliary earth bars.
Using it as a primary megohm insulation tester — resistance range is 0–200 kΩ, not a 1 kV insulation megger.
Ignoring CAT III 1000 V limits when working near energized distribution equipment.
Leaving battery count blank — meter takes 6 × 1.5 V AA.

When to RFQ / what to tell us

Confirm 3-pole fall-of-potential method (not clamp-on) and expected Ω range.
Need for AC earth voltage / DC voltage / continuity alongside ground resistance.
Quantity, ship-to, and whether spare earth bars or leads must ship with the kit.

Request a Quote · Get selection help

Specs

Spec	Value
SKU	31303
Brand	Extech
Model	382252
Product type	earthgroundresistance_tester
Measuring Range	Earth ground resistance 20/200/2000 Ω; AC earth voltage 0–200 VAC (50–400 Hz); DC voltage 0–1000 V; resistance 0–200 kΩ; continuity 40 Ω
Accuracy	Earth ground ±(2% rdg + 2 d); earth voltage ±(3% rdg + 3 d); DC voltage ±(0.8% rdg + 3 d); resistance ±(1% rdg + 2 d) per Extech 382252 DS
Output Signal	Large dual display with backlight; Test Hold; overrange/low-battery indication
Supply Voltage	6 × 1.5 V AA batteries
Ambient Temperature	0 to 40 °C (32 to 104 °F); RH 80% max (UM)
Sensor Type	3-pole earth ground resistance tester kit
Electrical Connection	E/P/C terminals with test leads and 2 auxiliary earth bars
Mounting	Handheld with protective rubber holster and carrying case
Approvals	CE; CAT III 1000 V; EN61010-1
Notes	Test current <2.5 mA at 820 Hz. Specs from Extech 382252 DS (flir.netx 51642) and UM (48134).

Documents

Extech 382252 user manual (PDF)

FAQ

Q: Is this clamp-on ground testing? A: No — it is a 3-pole earth ground resistance tester kit with E/P/C terminals and two auxiliary earth bars.

Q: What ranges does it cover? A: Earth ground 20/200/2000 Ω; also AC earth voltage 0–200 VAC, DC voltage 0–1000 V, resistance 0–200 kΩ, continuity 40 Ω.

Q: What should I send for a quote? A: Method confirmation, range need, quantity, ship-to. Compatible with systems using Extech 382252 — we do not claim authorized-dealer status.