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GENERAL SAFETY INFORMATION: Always read before proceeding.

Warning
These instructions contain both information and warnings that are necessary for the safe operation 
and maintenance of this product. It is recommended that you read the instructions carefully and 
ensure that the contents are fully understood. Failure to understand and to comply with the warnings 
and instructions can result in serious injury, damage or even death.

In order to avoid the danger of electrical shock, it is important that proper safety measures are taken 
when working with voltages exceeding 30V AC rms, 42V AC peak or 60V DC.

This product must only be used by a competent person capable of interpreting the results under the 
conditions and for the purposes for which it has been constructed. Particular attention should be paid 
to the Warnings, Precautions and Technical Specifications. Always check the unit is in good working 
order before use and that there are no signs of damage to it. Do not use if damaged.

Where applicable other safety measures such as use of protective gloves, goggles etc. should be 
employed.

Please keep these instructions for future reference. Updated instructions and product information are 
available at: www.martindale-electric.co.uk

REMEMBER: SAFETY IS NO ACCIDENT
MEANING OF SYMBOLS:   

 

 

 

Equipment complies with relevant EU Directives

 

End of life disposal of this equipment should be 

 

in accordance with relevant EU Directives  

 

Caution - risk of electric shock

 
 

Caution - risk of danger & refer to instructions

 CAT IV   Overvoltage Category IV (CAT IV) is for equipment at or near the origin of the electrical supply 

including LV substation bus bars, electricity tariff meters and primary overcurrent protection 
devices.

Thank you for buying one of our products. For safety and full understanding of its benefits please read this 
manual before use. Technical support is available from 01923 441717 and [email protected].

1. INTRODUCTION

1.2 Description

The DRUMMOND G Clamp is a moulded insulated clamp-on connector designed to provide a direct 
connection to a rigid rectangular bus bar.
The clamp-on facility eliminates the need to drill the bus bar.
The insulated materials reduce the risk to the installer.
To counter the effects of vibration, a spring-loaded contact pin ensures consistent electrical contact force that 
is independent of the clamp screw installed torque and a locking ring nut secures the clamp screw against 
loosening.
Fluted grip features enable the clamping screw and locking ring nut to be tightened by hand while wearing 
PPE insulated gloves. This eliminates the need to use tools within the bus bar chamber.

Summary of Contents for DRUMMOND G Clamp

Page 1: ...DRUGCLAMP FUSED G CLAMP TYPE BUS BAR CONNECTOR Instruction Manual ...

Page 2: ...indale electric co uk REMEMBER SAFETY IS NO ACCIDENT MEANING OF SYMBOLS Equipment complies with relevant EU Directives End of life disposal of this equipment should be in accordance with relevant EU Directives Caution risk of electric shock Caution risk of danger refer to instructions CAT IV Overvoltage Category IV CAT IV is for equipment at or near the origin of the electrical supply including LV...

Page 3: ...ler or responsible body before any decision is made to install or manipulate the G Clamp or the plug connection while the bus bar is HAZARDOUS LIVE Appropriate PPE must be worn unless the bus bar is known to be isolated from all risk of hazardous voltages including the effects of capacitance inductance switching transients or lightning strike The installer must adhere to the working practices issu...

Page 4: ...M16 THREAD FINGER GUARD SHROUDED 4mm SOCKET HOLD G CLAMP FIRMLY WHILE TIGHTENING FLUTED SCREW AND FLUTED RING NUT BRASS CONTACT IS FULLY COMPRESSED WHEN MOULDED SCREW TOUCHES BUS BAR CONTACT FORCE 40N 5N OPEN G CLAMP ENOUGH TO FIT OVER BUS BAR TYPICAL BUS BAR MOUNT G CLAMP ONTO TOP EDGE OF BUS BAR 2 TIGHTEN FLUTED RING NUT BY HAND 45 MAX ONE FLUTE 1 TIGHTEN LARGE FLUTED SCREW HEAD BY HAND ONLY 45 ...

Page 5: ...CT 4mm PLUG BEFORE UNSCREWING FUSEHOLDER TIGHTEN FUSHOLDER ONLY FINGER TIGHT ENSURE THAT FUSE 6 35 x 32mm IS CORRECTLY MATCHED TO APPLICATION 4 MAINTENANCE 4 1 Fuse Replacement The Fused Drummond G Clamp is supplied as standard with a 6 35 dia X 32mm 600V 0 5A 50kA ceramic HRC rated fuse but this may have been changed for a different fuse rating at the time of initial installation A fuseholder bod...

Page 6: ...e spring loaded contact pin and locking ring ensure reliable results throughout extended logging periods The G Clamp can be tightened by hand when wearing PPE gloves eliminating the need to use tools in the bus bar chamber They are available in Brown Black and Grey The standard fused version is supplied with a replaceable 0 5A fuse within the clamping screw providing protection at the source Other...

Page 7: ...INGER GUARD SHROUDED 4mm SOCKET HOLD G CLAMP FIRMLY WHILE TIGHTENING FLUTED SCREW AND FLUTED RING NUT BRASS CONTACT IS FULLY COMPRESSED WHEN MOULDED SCREW TOUCHES BUS BAR CONTACT FORCE 40N 5N OPEN G CLAMP ENOUGH TO FIT OVER BUS BAR TYPICAL BUS BAR MOUNT G CLAMP ONTO TOP EDGE OF BUS BAR 2 TIGHTEN FLUTED RING NUT BY HAND 45 MAX ONE FLUTE 1 TIGHTEN LARGE FLUTED SCREW HEAD BY HAND ONLY 45 MAX ONE FLUT...

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