A 4mm shrouded socket is provided in the fluted head of the moulded screw.
The connection is suitable for up to 10A continuous use at 600V AC, subject to appropriate rating of the 4mm
plug and lead.
The fluted screw head incorporates a finger guard to signify the limit of the ACCESSIBLE area at the head of
the screw.
SPRING LOADED BRASS CONTACT PIN
G CLAMP BODY
FLUTED RING NUT
FLUTED SCREW HEAD WITH
MOULDED 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° MAX
(ONE FLUTE).
ALLOW AT LEAST
35mm CLEARANCE
FOR DRUMMOND
4mm PLUG.
NOTE THAT OTHER
DESIGNS OF 4mm PLUG
MAY REQUIRE
CONSIDERABLY
MORE CLEARANCE
45° MAX
45°
MAX
12
12
14
14
22
22
HAZARDOUS LIVE
HAZARDOUS LIVE
CATEGORY IV 600V
CATEGORY IV 600V
50
52
35
87
87
ALLOW CLEARANCE FOR
HEAD OF FUSEHOLDER
ALLOW AT LEAST 75mm CLEARANCE
TO WITHDRAW FUSEHOLDER
ACCESIBLE FUSE
75
FUSEHOLDER
FUSEHOLDER
DISCONNECT 4mm PLUG
BEFORE UNSCREWING FUSEHOLDER.
TIGHTEN FUSHOLDER ONLY FINGER TIGHT.
ENSURE THAT FUSE 6.35 x 32mm IS
CORRECTLY MATCHED TO APPLICATION
2. PRODUCT SPECIFIC SAFETY INFORMATION
2.1
RISK ASSESSMENT
Warning
It must be noted that this G Clamp provides a direct electrical connection to a bus bar.
The G Clamp does not contain any attenuation or impedance.
Therefore, a full risk assessment must be undertaken by the installer 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 issued by the responsible body. Since these working
practices and the conditions of use are outside the control of Martindale Electric, no liability can be accepted for
the outcome.
2.2 Further checks
Warning
Before use check the unit for cracks or any other damage. Make sure the unit is free from dust, grease and
moisture. Also check any associated leads. Do not use if damaged.
Caution
Avoid severe mechanical shock or vibration and extreme temperature.
3. INSTALLATION
Warning
Refer to Risk Assessment at 2.1 before commencing installation.
The DRUMMOND G Clamp should be mounted on the top edge of the bus bar.
A location should be selected that allows easy access to hold the G Clamp securely while the screw is being
tightened. A suitable physical clearance is required to allow for the 4mm plug connection. This will depend on
the choice of plug. A clearance of 35mm is required for a standard DRUMMOND 4mm fixed-shroud plug. Note
that other designs of 4mm plug might require considerably more clearance. Moving elements of doors, hinges,
door locking systems and other covers must also be taken into account.
For withdrawal of fuse holder allow a further 75mm.
