Larson Electronics EPS-10HP-3PST Operation Manual

For use in Class I, Groups B, C & D, Type 3, 4 & 4X and Class II, Groups E, F & G, and Class III Hazardous
Locations, as defined by the Canadian Electrical Code and the National Electrical Code.
IMPORTANT: This enclosure and device must be installed by trained, qualified and competent personnel. Installation
must comply with local, state and national regulations, as well as safety practices for this type of equipment.
WARNING: Electrical power must be OFF during installation, or performing any maintenance. Disconnect primary power
source and lock out.
CAUTION: Before installing, make sure you are compliant with area classifications, failure to do so may result in bodily
injury, death and property damage. Do not attempt installation until you are familiar with the following procedures. All
installation must comply with the applicable Electrical Code. Make sure that the circuit is De-energized before starting
installation or maintenance. Verify that the installation is grounded. Failure to ground will create electrical shock hazards,
which can cause serious injury and or death. Important: Please read these instructions carefully before installing or
maintaining this equipment. Good electrical practices should be followed at all times and this data should be used as a
guide only.
ENCLOSURE MOUNTING INSTALLATION:
If you have received fully assembled enclosure with factory installed devices, there is no need to review the illustrations on
the following pages. Just follow the instructions and warnings bellow for installing and wiring the enclosure.
The mounting location must be flat and provide proper clearance, rigidity and strength to support the enclosure and all
contained devices.
Securely fasten the enclosure to the mounting location. Install sealing fittings, cable glands, unions and/or conduit, using
an approved electrical conducting type lubricant on the threads. The conduit thread connections must be tapered pipe
thread conforming to ANSI B1.20.1. A minimum of (5) full threads engagement is required for all conduit connections.
Conduit sealing fittings must be installed within 18 inches of the enclosure. Sealing fittings must be approved for the
specific hazardous location where the enclosure is used. All unused conduit openings must be plugged using close-up
plugs. Plugs must be tightly installed with a minimum engagement of (5) full threads.
▲ Inspect and clean the machined flange flame joint surfaces of both the cover and the box. Surfaces must be smooth,
free of nicks, scratches, dirt or any foreign particle build-up that would prevent a proper seal. Surfaces must seat fully
against each other to provide a proper explosion-proof joint. Clean surfaces by wiping with a clean, lint-free cloth.
Apply a light coating of lubricant to flange surfaces and close the cover. Tighten all cover bolts. Use only those bolts
supplied with the enclosure. Check the bolted joint with a .0015 thick feeler gauge. The gauge must not enter the joint
more than 1/8" at any point. NOTE: Loose bolts or an improper joint can result in an explosion, creating a potential for
personal injury and property damage.
NOTE: If installing a breather and/or a drain, make certain they are suitable for the specific hazardous location where
they are to be used. Some drains/breathers may not comply with Nema 3 & 4 standards. Also, provide a protective
covering to shield the breather and drain during hose-down operations.
Larson Electronics, LLC
EPS-10HP-3PST OPERATION MANUAL
Explosion Proof 3-Pole Starter Switch
READ THIS SHEET CAREFULLY BEFORE BEGINNING INSTALLATION.
Phone: (800) 369-6671
EPS-10HP-3PST – Explosion Proof 3-Pole Starter Switch
Fax: (903) 498-3364 www.larsonelectronics.com 1 of 7