Fluke 1664B Multifunction Installation Tester

The Fluke 1664B Multifunction Installation Tester is Fluke’s most advanced tester for verifying electrical installations to AS/NZS 3000 standards. It features Insulation PreTest to protect appliances, Auto Test for faster compliance testing, and comprehensive loop and RCD functions. Built for electricians who need accuracy, speed, and confidence on every job, the 1664B delivers reliable results with smart automation and rugged field performance.

Core Specifications

• Insulation test voltages: 100 V, 250 V, 500 V, 1000 V
• Insulation PreTest: Prevents accidental appliance damage by detecting connected loads before applying test voltage
• Loop testing: High‑current, low‑current, and no‑trip loop tests
• RCD testing:
  • Type AC, A, S, and F
  • Auto‑sequence RCD test
  • Ramp test
• Continuity: 200 mA and 10 mA options
• Voltage & frequency: True RMS
• Earth resistance: 2‑pole and 3‑pole
• Auto Test: Runs a full sequence of installation tests with one button
• Safety rating: CAT III 500 V
• Memory & connectivity:
  • Onboard storage
  • Fluke Connect compatibility (depending on region)

Best Use Cases

• AS/NZS 3000 electrical installation testing
• RCD verification and loop impedance testing
• Commissioning new circuits
• Periodic inspection and compliance checks
• Commercial and industrial electrical maintenance
• Electricians who want maximum automation and reduced test time

Hiring with Measurements101
Booking is simple: select your dates, choose your equipment, and check out. Once your order is placed, we’ll be in touch within the hour to organise delivery.
Not sure if this is the right tester for your job? Give us a call anytime — we’re always happy to help you get the right tool.

*Specifications are indicative only and may vary in practice. Please confirm suitability for your application.*