Fluke 1664 FC Installation Tester

Fits electrical installation verification where you need insulation to 1000 V, RCD Type B / RDC-DD EV testing, loop/line impedance, earth resistance, and Fluke Connect logging in one handheld unit.

Key advantages

Fuller 1660 feature set — Insulation to 1000 V, earth resistance, Type B / VAR RCD, EV 6/60/200 mA RDC-DD.
Insulation PreTest + Auto Test — Guided workflows with Fluke Connect adapter path.
300 V CAT IV / 500 V CAT III — Same install-tester category class as the 166x family.
TruTest / DMS reporting — Software path for documented install results.

Typical applications

Install verification that includes Type B RCD and EV RDC-DD testing.
Sites needing earth resistance and phase sequence on the same handheld.
Teams logging results over Fluke Connect / TruTest.

Selection guide

Functions — AC voltage to 500 V; insulation 50/100/250/500/1000 V; continuity; loop/line Z; RCD trip time/current (A/AC/B/VAR); earth resistance; phase sequence; EV 6/60/200 mA RDC-DD.
Accuracy — Per EN61557 and Fluke 166x Users Manual specification tables (function-dependent).
Supply — 6× AA alkaline IEC LR6 (usable with 1.2 V NiMH).
Electrical connection — Detachable 4 mm leads; country-specific mains cord; zero adapter.
IP / environment — IP40 (IEC 60529); operating −10…+40 °C; storage −10…+60 °C (battery-limited); altitude 2000 m.
Display / comms — Dual display with backlight; Fluke Connect wireless (adapter); TruTest/DMS software.
Safety marks (datasheet) — IEC 61010-1 PD2; IEC 61010-2-030 300 V CAT IV / 500 V CAT III; EN61557-1…-7/-10 (model-dependent); IEC 61326-1 Portable.
Form — Handheld; 1.3 kg with batteries; size 10.0×25.0×12.5 cm.
Notes — Insulation PreTest, Auto Test, Type B/RDC-DD EV testing. Fuse T3.15 A 500 V.

Common mistakes

Ordering without confirming country-specific mains cord and plug set.
Assuming earth-resistance / phase-sequence coverage without checking the EN61557 model-dependent options on the order code.
Using the tester above CAT III 500 V / CAT IV 300 V limits stated for this model.
Expecting IP65 field sealing — published rating is IP40.
Skipping Fluke Connect adapter / TruTest workflow when reporting is part of the job.

When to RFQ / what to tell us

Required test set (insulation voltages, RCD types including EV RDC-DD, earth, phase sequence).
Country mains cord / plug standard and lead kit.
Whether Fluke Connect wireless + TruTest/DMS reporting is required.
Quantity, ship-to country, and any company standard (EN61557 scope) you must meet.
Whether you need a drop-in for an existing 166x fleet (compatible with Fluke 1664 FC workflows — we do not claim authorized-dealer status).

Request a Quote · Get selection help

Specs

Spec	Value
SKU	43386
Brand	Fluke
Model	1664 FC
Product type	other (multifunction installation tester)
Measuring range	AC voltage to 500 V; insulation 50/100/250/500/1000 V; continuity; loop/line Z; RCD trip time/current (A/AC/B/VAR); earth resistance; phase sequence; EV 6/60/200 mA RDC-DD
Accuracy	Per EN61557 and Fluke 166x Users Manual specification tables (function-dependent)
Supply voltage	6× AA alkaline IEC LR6 (usable with 1.2 V NiMH)
Electrical connection	Detachable 4 mm leads; country-specific mains cord; zero adapter
IP rating	IP40 (IEC 60529)
Ambient temperature	Operating −10…+40 °C; storage −10…+60 °C (battery-limited); operating altitude 2000 m
Display	Dual display with backlight
Communication	Fluke Connect wireless (adapter); TruTest/DMS software
Approvals	IEC 61010-1 Pollution Degree 2; IEC 61010-2-030 300 V CAT IV / 500 V CAT III; EN61557-1/-2/-3/-4/-5/-6/-7/-10 (model-dependent earth/phase); IEC 61326-1 Portable
Mounting	Handheld / portable installation tester
Weight	1.3 kg (with batteries)
Notes	Size 10.0×25.0×12.5 cm. Insulation PreTest, Auto Test, Fluke Connect, earth resistance, phase sequence, Type B/RDC-DD EV testing. Fuse T3.15 A 500 V.

Documents

FAQ

Q: Does 1664 FC cover EV RCD / RDC-DD testing? A: Datasheet lists EV 6/60/200 mA RDC-DD and Type B RCD trip functions. Confirm the exact RCD types on your sites in the RFQ.

Q: What CAT rating applies? A: IEC 61010-2-030 300 V CAT IV / 500 V CAT III per product data. Stay within those limits.

Q: Battery and weight? A: 6× AA alkaline (NiMH usable); 1.3 kg with batteries; size 10.0×25.0×12.5 cm.

Q: What should I send for a quote? A: Required functions, cord country, Fluke Connect/reporting need, quantity. Compatible with Fluke 1664 FC install-test workflows — we do not claim authorized-dealer status.