MEDC SM87JB User Manual

Page 3

07/13

1.0 INTRODUCTION

The SM87 Junction Box has been designed for use in flammable atmospheres and harsh environmental

conditions. The unit is available in marine grade alloy or stainless steel

2.0 GENERAL SAFETY MESSAGES AND WARNINGS

All instructions and safety messages in this manual must be followed to allow safe installation of the device. The

device must only be installed and maintained by correctly trained site personnel/installers.

To reduce the risk of ignition of hazardous atmospheres and shock, do not apply power to the device

until installation has been completed and the device is fully sealed and secured.

ii.

To reduce the risk of ignition of hazardous atmospheres and shock, keep device tightly closed when the

circuit is energised.

iii.

Before removing the cover for installation or maintenance, ensure that the power to the device is

isolated.

iv.

Following installation, test the device to ensure correct operation.

Following installation ensure a copy of this manual is made available to all operating personnel

vi.

When installing the device, requirements for selection, installation and operation should be referred to

e.g. IEE Wiring Regulations and the ‘National Electrical Code’ in North America. Additional national

and/or local requirements may also apply.

vii.

Cable termination should be in accordance with specification applying to the required application.

MEDC recommends that all cables and cores should be correctly identified. Please refer to the wiring

diagram in this manual (or separate diagram provided with the unit).

viii.

Ensure that only the correct listed or certified cable glands are used and that the assembly is shrouded

and correctly earthed.

ix.

Ensure that only the correct listed or certified stopping plugs are used to blank off unused gland entry

points and that the NEMA/IP rating of the unit is maintained.

MEDC recommend the use of a sealing compound such as HYLOMAR PL32 on the threads of all glands

and stopping plugs in order to maintain the IP rating of the unit.

xi.

The internal earth terminal, where fitted, must be used for the equipment grounding and the external

terminal, if available, is for a supplementary bonding connection where local codes or authorities

permit or require such a connection.

xii.

When installing the device, MEDC recommends the use of stainless steel fasteners. Ensure that all nuts,

bolts and fixings are secure.

3.0 INSTALLATION

General
The junction box is mounted via 4 off 9mm fixing holes in feet on the base of the unit.

The fixing holes have been designed to accept M8 screws or bolts.

Removing/replacing the Cover

Unscrew and remove the 4 off M6 screws (5mm A/F hexagon key required) holding the cover to the base of the

enclosure. Twist the cover gently clockwise and anti-clockwise whilst pulling away from the base. Lift the cover

clear of the base. The screws are not captive and should be kept in a safe place during cable termination

Once cable termination has been completed, the cover can be replaced and secured to the enclosure. Ensure that

any cover seal is correctly seated. Once the cover screws have been fully tightened, ensure the gap between the

cover and enclosure is 0.15mm max.