MARTINDALE DRUGCLAMP UNFUSED G Clamp Type Bus Bar Connector Instruction Manual
- June 4, 2024
- MARTINDALE
Table of Contents
MARTINDALE DRUGCLAMP UNFUSED G Clamp Type Bus Bar Connector
GENERAL SAFETY INFORMATION
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
INTRODUCTION
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. 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.
PRODUCT SPECIFIC SAFETY INFORMATION
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.
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.
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.
The bus bar surface should be clean at the area of intended contact. If
necessary, clean the bus bar surface according to the instructions issued by
the responsible body. The G Clamp should be opened as far as necessary to
engage fully over the edge of the bus bar. Hold the G Clamp stable and tighten
the M16 moulded screw against the face of the bus bar to compress the spring-
loaded brass contact. The brass contact will be compressed into the screw
until the end face of the moulded screw touches the surface of the bus bar.
Tighten the fluted head of the moulded screw BY HAND a further 30 – 45
degrees. (Equivalent to ONE flute MAXIMUM). DO NOT OVERTIGHTEN.
After tightening the screw, tighten the fluted ring nut against the G Clamp
body to lock the screw. Tighten the fluted ring nut BY HAND a further 30 – 45
degrees after first touches the G Clamp body, (ONE flute MAXIMUM). DO NOT
OVERTIGHTEN.
Equipment leads must use 4mm plugs of appropriate rating for the installation.
It is recommended that equipment leads include a fuse link of appropriate
rating, located as close as is practical to the G Clamp. Attach the equipment
lead to the 4mm socket in the head of the screw. Leads should be dressed and
supported so that no forces act on the G Clamp or the 4mm plug. The G Clamp is
intended to be a fixed connection. In NORMAL use, after correct installation,
the G Clamp is not intended to be hand-held or handmanipulated by the OPERATOR
during measurements or tests. After a suitably rated 4mm fixed-shroud plug has
been connected to the 4mm socket in the screw head, the area on the head side
of the finger guard is rated CATEGORY IV 600V and provides REINFORCED
INSULATION against 8kV transient impulse. The area on the threaded side of the
finger guard should be treated as HAZARDOUS LIVE at all times.
Specification
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. 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.
Full models range
- DRUGCLAMP/WH (Unfused White)
- DRUGCLAMP/RD (Unfused Red)
- DRUGCLAMP/BK (Unfused Black)
- DRUGCLAMP/BR (Unfused Brown)
- DRUGCLAMP/GY (Unfused Grey)
- DRUGCLAMP/BL (Unfused Blue)
ELECTRICAL SPECIFICATIONS
- Applied electrical contact force: 40N +/- 5N
- Maximum working voltage: 600V AC
- Maximum working current: 10A
GENERAL SPECIFICATIONS
- Temperature & Humidity:
- Operating: -15°C to 60°C ≤ 80% R.H.
- Storage: -15°C to 60°C ≤ 80% R.H.
- Altitude: up to 2000m
Dimensions
- Length behind bus bar: 12mm
- Length in front of bus bar: 61mm (+ 35mm as minimum allowance for 4mm plug)
- Height above top of bus bar: 14mm
- Width: 50mm for locking ring nut
Bus bar
Suitable for rectangular bus bar ONLY. Not suitable for round conductor.
- Minimum Bar width: 20mm
- Minimum bar thickness: 4mm
- Maximum bar thickness: 26mm
Materials
- Nylon 66, reinforced with glass fibre. Brass contact pin
Safety
Conforms to BS EN 61010-031:2015 Installation Overvoltage Rating CAT IV 600V
- Pollution Degree: 2
- IP rating: IP40 (with connector in mated position)
RISK ASSESSMENT
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.
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References
- Martindale Electric - Manufacturer of Voltage Indicators, PAT Testers & Socket Testers
- Martindale Electric - Manufacturer of Voltage Indicators, PAT Testers & Socket Testers