Fluke 1664FC UK Multifunction Installation Tester

The Fluke 1664FC UK Multifunction Installation Tester is a comprehensive handheld device designed for electrical professionals who need to verify installation safety and compliance across multiple test types. Combining insulation resistance, earth resistance, loop impedance, and RCD testing in a single unit, it eliminates the need for carrying multiple instruments to job sites. The instrument is particularly valuable for electricians, maintenance engineers, and electrical contractors who must ensure installations meet BS 7671 requirements and verify the integrity of protective devices. Its robust design and intuitive interface make it suitable for both routine periodic inspection work and fault finding on existing installations.

Fluke 1664FC UK Key Features

This multifunction installation tester delivers precise measurement capabilities across all essential electrical safety tests. The insulation resistance function supports test voltages of 50 V, 100 V, 250 V, 500 V, and 1000 V with accuracies suited to installation verification. Earth resistance testing ranges from 200 Ω to 2000 Ω with 0.1 Ω resolution, while loop and line impedance measurement enables prospective fault current calculations. The RCD testing functionality covers AC, A, G, S, and B types, including tripping speed analysis and ramp current measurement. Additional features include phase sequence indication for wiring verification and continuity testing with autoranging from 20 Ω to 2000 Ω.

• AC voltage measurement: 500 V range, 0.1 V resolution, 0.8% + 3 accuracy
• Insulation resistance: 50-1000 V test voltages, multiple range options
• Earth resistance: 200 Ω / 2000 Ω ranges, 0.1 Ω / 1 Ω resolution
• Loop impedance: 10 Ω / 0.001 Ω / high current mΩ mode
• RCD testing: AC, A, G, S, and B types with tripping speed analysis
• Phase sequence indication for live circuit verification
• Continuity testing: 20 Ω / 200 Ω / 2000 Ω autoranging

Who Needs the Fluke 1664FC UK?

Electrical technicians responsible for periodic inspection and testing of domestic and commercial installations will find the Fluke 1664FC UK indispensable for completing comprehensive test schedules efficiently. The device’s multifunction capability means engineers can perform insulation resistance, earth resistance, and loop impedance tests without switching between different instruments, reducing test time and improving consistency across multiple measurement points. Maintenance teams responsible for RCD compliance checks will appreciate the ability to test multiple RCD types and verify tripping characteristics against manufacturer specifications.

Electrical contractors undertaking new installations benefit from the phase sequence indication feature, which helps verify correct wiring polarity before energizing circuits. Buyers and specifiers specifying test equipment for procurement will value the instrument’s broad capability range, which covers the typical test requirements found in BS 7671 Appendix 3 without the need for separate dedicated testers. The instrument’s data logging capability and lead alert function further support quality assurance procedures and provide additional safety verification during testing procedures.

Fluke 1664FC UK Applications

In domestic periodic inspection scenarios, the Fluke 1664FC UK enables electricians to complete comprehensive electrical condition reports covering insulation resistance, earth loop impedance, and RCD functionality on consumer units. The earth resistance testing function is particularly useful for verifying earthing arrangements in outbuildings, gardens, and temporary installations where earth electrode resistance must be confirmed to ensure protective device operation. For commercial and industrial installations, the multifunction tester supports maintenance planning by providing consistent measurement data across multiple circuits, facilitating trend analysis and preventive maintenance scheduling.

The RCD testing capabilities extend to verifying correct tripping currents and times for type A and type B RCDs, which are increasingly common in modern installations with sensitive electronic equipment and EV charging circuits. Phase sequence indication assists in three-phase wiring verification, ensuring motors and three-phase loads connect correctly to prevent damage or inefficient operation. The loop impedance measurement function provides the data necessary to calculate prospective fault currents, supporting the selection and coordination of overcurrent protective devices.

Why Buy Fluke 1664FC UK from MME?

MME provides genuine Fluke instrumentation with full manufacturer warranty and certification, ensuring the Fluke 1664FC UK Multifunction Installation Tester meets the high reliability standards expected by electrical professionals. Our stock includes the complete Fluke range, and we offer product support to help customers select the right tester for their specific application requirements. When you purchase from mme-ae, you benefit from genuine stock availability and the expertise of a supplier who understands the needs of electrical contractors and maintenance teams across the UAE market.

Mohammad Mahdi Electronics (MME) maintains competitive pricing on test and measurement equipment while prioritizing authentic product supply. The Fluke 1664FC UK represents a significant investment in testing capability, and our team can provide guidance on test lead compatibility, RCD test requirements, and interpretation of measurement results for compliance reporting. We stock accessories including test leads and probes to support immediate deployment upon delivery.

Technical specifications for the Fluke 1664FC UK include the following measurement parameters. AC voltage measurement ranges up to 500 V with 0.1 V resolution and 0.8% + 3 accuracy between 45-66 Hz. Insulation resistance supports test voltages of 50 V, 100 V, 250 V, 500 V, and 1000 V with corresponding current ranges and accuracies. Earth resistance measurement offers 200 Ω and 2000 Ω ranges with 0.1 Ω and 1 Ω resolution respectively. Loop and line impedance provides autoranging from 10 Ω down to 0.001 Ω in high current mΩ mode. RCD testing covers AC, A, G, S, and B types with specified tripping current ranges and speed analysis capabilities. Phase sequence indication provides visual polarity verification on live circuits. The instrument measures 10 x 25 x 12.5 cm and weighs 1.3 kg including six AA batteries, with IP-40 sealing for dust and splash protection.

Choose MME for your Fluke 1664FC UK purchase and receive genuine equipment with the support and expertise needed to maintain electrical safety standards. Our commitment to authentic stock means you can trust the measurement accuracy and reliability of every instrument we supply. Contact our technical team to discuss your specific testing requirements or to confirm compatibility with your existing test procedures.

Fluke 1664FC UK Specifications

AC voltage measurement
Range	500 V
Resolution	0.1 V
Accuracy 45 Hz – 66 Hz	0.8% + 3
Input impedance	360 kΩ
Overload protection	660 V rms
Continuity testing (RLO)
Range (autoranging)	20 Ω / 200 Ω / 2000 Ω
Resolution	0.01 Ω / 0.1 Ω / 1 Ω
Open Circuit Voltage	>4 V
Insulation resistance measurement (RISO)
Test voltages	50-100-250-500-1000 V
Accuracy of tTest voltage (at rated test current)	+10%, -0%
Test voltage	50 V 100 V 250 V 500 V 1000 V
Insulation resistance range	20 MΩ /50 MΩ 20 MΩ / 100 MΩ 20 MΩ / 200 MΩ 20 MΩ / 200 MΩ / 500 MΩ 20 MΩ / 200 MΩ / 1000 MΩ
Resolution	0.01 MΩ / 0.1 MΩ 0.01 MΩ / 0.1 MΩ 0.01 MΩ / 0.1 MΩ 0.01 MΩ / 0.1 MΩ / 1 MΩ 0.01 MΩ / 0.1 MΩ / 1 MΩ
Test current	1 mA @ 50 kΩ 1 mA @ 100 kΩ 1 mA @ 250 kΩ 1 mA @ 500 kΩ 1 mA @ 1 MΩ
Loop and line impedance (ZI)
Range	10 Ω / 0.001 Ω / High current mΩ mode
Resolution	0.01 Ω / 0.1 Ω / 1 Ω
Prospective earth fault current, PSC test
Range	1000 A / 10 kA (50 kA)
Resolution	1 A / 0.1 kA
Computation	Prospective earth fault current (PEFC) or Prospective short circuit current (PSC) determined by dividing measured mains voltage by measured loop (L-PE) resistance or line (L-N) resistance, respectively.
RCD testing, RCD types tested
RCD Type	AC¹ G²,S³
Model 1664	A, AC, B5, S
Notes	¹Responds to AC ²General, no delay ³Time delay 4Responds to pulsed signal 5Responds to smooth DC signal
Tripping speed test (ΔT)
Current settings¹	10-30-100-300-500-1000 mA – VAR 10-30-100 mA
Multiplier	x ½, x 1 x 5
Measurement range	RCD Type G	310 ms 50 ms
	RCD Type S	510 ms 160 ms
Notes	¹1000 mA type AC only 700 mA maximum type A in VAR mode VAR mode not available for type B.
RCD/FI-Tripping Current Measurement/Ramp Test (IΔN)
Current range	30% to 110% of RCD rated current¹
Step size	10% of IΔN²
Dwell time	Type G	300 ms/step
	Type S	500 ms/step
Measurement accuracy	±5%
Specified trip current ranges (EN 61008-1)	50% to 100% for Type AC 35% to 140% for Type A (>10 mA) 35% to 200% for Type A (≤10 mA) 50% to 200% for Type B ²5% for Type B
Notes	¹30% to 150% for Type A IΔN > 10 mA 30% to 210% for Type A IΔN = 10 mA 20% to 210% for Type B
Earth Resistance Test (RE)
Range	200 Ω / 2000 Ω
Resolution	0.1 Ω / 1Ω
Frequency	128 Hz
Output Voltage	25 V
Phase Sequence Indication
Icon	Phase Sequence indicator is active.
General Specifications
Size (L x W x H)	10 x 25 x 12.5 cm
Weight (incl. batteries)	1.3 Kg
Battery size, quantity	Type AA, 6 ea.
Sealing	IP-40
Safety	Complies with EN61010-1 Ed 2.0 (2001-02), UL61010, ANSI/ISA –s82.02.01 2000 and CAN/CSA c22.2 No. 1010 2nd edition
Overvoltage	CAT III / 500V; CAT IV 300V
Performance	EN61557-1 to EN61557-7 Second Edition and EN61557-10 Second Edition