e L-O-X® Series Electrical Isolation Devices – Operating Instructions

Overview

The ROSS Controls® e L-O-X® Series Electrical Isolation Devices provide a reliable and compliant solution for electrical energy isolation in industrial machine safety applications. Designed as dedicated lockout/tagout devices, the e L-O-X® Series integrates a disconnect switch with an IEC load switch to isolate three-phase electrical power from machinery, enabling maintenance personnel to perform safe work in accordance with OSHA 29 CFR 1910.147 and related standards.

The e L-O-X® product line is available in four current ratings: 30A (E-LOX-030R3A), 60A (E-LOX-060R3A), 100A (E-LOX-100R3A), and 200A (E-LOX-200F3A), covering the full range of typical industrial three-phase machine loads. Each model includes a voltage indicator to provide visual confirmation of isolation status before entry. The e L-O-X® Series is designed by ROSS Controls, a company founded in 1921 with over 100 years of experience in fluid power and machine safety solutions.

ROSS Controls offers the e L-O-X® Series as part of a comprehensive machine safety ecosystem that includes pneumatic energy isolation (L-O-X® Series), the ElectroGuard® Energy Isolation System, and related lockout/tagout products. Contact ROSS at 1-800-GET-ROSS or visit www.rosscontrols.com for additional information.

Key Features

Multi-Amperage Coverage – 30A to 200A

The e L-O-X® Series covers four load ratings to match different machine electrical requirements. Model E-LOX-030R3A provides 30A isolation; E-LOX-060R3A provides 60A; E-LOX-100R3A provides 100A; and E-LOX-200F3A provides 200A. This range ensures the correct isolation device can be selected for the specific machine electrical service.

Integrated Voltage Indicator

Each e L-O-X® unit includes a voltage indicator that provides visual confirmation of the electrical isolation state. The indicator shows whether voltage is present on the load side of the disconnect, giving maintenance personnel clear visual evidence before accessing isolated machine elements. This feature directly supports compliance with OSHA lockout/tagout verification requirements.

Disconnect Switch and IEC Load Switch

The e L-O-X® Series uses a disconnect switch combined with an IEC load switch to achieve three-phase electrical isolation. The wiring routes incoming customer line connections (L1, L2, L3) through the disconnect and load switch to outgoing customer load connections (T1, T2, T3). Ground connections are provided throughout to maintain system safety integrity. START/TEST and STOP control connections are available on the device.

Technical Specifications

The following specifications are drawn from the official ROSS Controls e L-O-X® Series Operating Instructions (Doc ID 410):

Model E-LOX-030R3A: Load Rating 30 Amps (three-phase)
Model E-LOX-060R3A: Load Rating 60 Amps (three-phase)
Model E-LOX-100R3A: Load Rating 100 Amps (three-phase)
Model E-LOX-200F3A: Load Rating 200 Amps (three-phase)
Incoming line connections: L1, L2, L3 (customer supplied)
Outgoing load connections: T1, T2, T3 (to machine)
Ground: 8AWG GRN protective earth; GRD at input and output
Main circuit wiring: 6AWG BLK
Control wiring: 18AWG BLK (voltage indicator, START/TEST, STOP)
Voltage indicator: Load-side voltage presence indication
Disconnect switch: OFF (0) and ON (1) positions

Applications

Machine Lockout/Tagout Compliance

The e L-O-X® Series is designed specifically for machine lockout/tagout (LOTO) applications where three-phase electrical energy must be positively isolated before maintenance work. Compliance with OSHA 29 CFR 1910.147, CSA Z460, and related lockout/tagout standards requires that energy sources be isolated and verified de-energized before personnel access. The voltage indicator and disconnect switch combination directly supports this requirement.

Industrial Machine Safety Integration

The e L-O-X® Series integrates with ROSS Controls pneumatic and hydraulic energy isolation products to create comprehensive multi-energy-source isolation systems. When combined with the L-O-X® pneumatic isolation valve or the ElectroGuard® Energy Isolation System, the e L-O-X® contributes to a complete lockout solution for machines powered by multiple energy sources – electrical, pneumatic, and hydraulic.

Safety and Compliance Standards

The e L-O-X® Series Electrical Isolation Devices are designed for use in energy isolation applications subject to OSHA 1910.147 (Control of Hazardous Energy) and equivalent international standards. Per specifications and regulations, ROSS e L-O-X® and L-O-X® devices are defined as energy isolation devices, NOT as emergency stop devices. They must not be used as a substitute for emergency stop systems.

All installation and use of e L-O-X® Series devices must be performed by qualified, trained electrical personnel. The voltage indicator provides isolation verification, but all appropriate lockout/tagout procedures including personal locks and tags must always be followed.

Installation and Setup Guide

Wiring – Models 30A, 60A, 100A (E-LOX-030R3A, -060R3A, -100R3A)

Connect incoming three-phase customer line connections L1, L2, L3 and GRD to the input terminals of the disconnect switch. The IEC load switch connects disconnect output terminals (1/L1, 3/L2, 5/L3 to 2/T1, 4/T2, 6/T3) to the outgoing customer load connections T1, T2, T3. Protective earth ground continuity is maintained through the 8AWG GRN connection from input GND to output GRD. START/TEST and STOP control signals connect via 18AWG BLK wire. The voltage indicator connects via 18AWG BLK wire to L1, L2, L3 on the load side.

Wiring – Model 200A (E-LOX-200F3A)

For model E-LOX-200F3A, the same wiring topology applies with conductor sizes appropriate for 200A service. All wiring must comply with applicable local electrical codes and be performed by qualified electricians. The voltage indicator is wired to provide load-side voltage presence indication confirming isolation after the disconnect is opened.

Verification and Testing

After installation, verify that the disconnect switch moves freely between the OFF (0) and ON (1) positions. Test the voltage indicator with a known live source to confirm its function. Perform a full lockout sequence: isolate the energy source, verify de-energization with the voltage indicator and an appropriate test instrument, and apply lockout tags before authorizing access to the isolated machine.

Why Choose ROSS Controls

ROSS Controls has been at the forefront of machine safety and energy isolation technology since 1921. The e L-O-X® Series reflects ROSS's commitment to practical, reliable safety solutions for lockout/tagout compliance. As part of the broader ROSS machine safety portfolio including pneumatic L-O-X® valves and the ElectroGuard® Energy Isolation System, the e L-O-X® provides a coordinated approach to multi-energy-source isolation. Contact ROSS at 1-800-GET-ROSS or visit www.rosscontrols.com.

Download This Document

The official ROSS Controls e L-O-X® Series Electrical Isolation Devices Operating Instructions (Doc ID 410) can be downloaded from the ROSS Controls document library.

PDF Download URL: https://ross-admin-global-us-east.s3.amazonaws.com/production/uploads/document_language_file/file/410/ROSS_Electrical_E_L-O-X_Series_Operating_Instructions_RC-E-LOX-OI.pdf

Frequently Asked Questions

Q: What load ratings are available for the e L-O-X® Series?

A: The e L-O-X® Series is available in four load ratings: 30A (E-LOX-030R3A), 60A (E-LOX-060R3A), 100A (E-LOX-100R3A), and 200A (E-LOX-200F3A), covering the range of typical three-phase industrial machine loads.

Q: Is the e L-O-X® Series suitable for use as an emergency stop device?

A: No. Per specifications and regulations, e L-O-X® and L-O-X® devices are defined as energy isolation devices, NOT as emergency stop devices. They are designed for lockout/tagout procedures and must not be used as substitutes for emergency stop systems.

Q: What standards does the e L-O-X® Series support compliance with?

A: The e L-O-X® Series supports compliance with OSHA 29 CFR 1910.147 (Control of Hazardous Energy) and equivalent international standards including CSA Z460.

Q: How does the voltage indicator work on the e L-O-X® Series?

A: The voltage indicator connects to the load side of the isolation device and provides visual confirmation of whether voltage is present after isolation. It supports the mandatory verification step in the lockout/tagout procedure, confirming de-energization before personnel access.

Q: Can the e L-O-X® Series be used with ROSS pneumatic isolation products?

A: Yes. The e L-O-X® Series is designed to complement ROSS pneumatic energy isolation products including the L-O-X® valve series and the ElectroGuard® Energy Isolation System, enabling integrated multi-energy-source isolation.

Q: What wiring gauge is required for the e L-O-X® Series?

A: Main circuit power wiring uses 6AWG BLK conductors. Protective earth grounding uses 8AWG GRN conductors. Control signal wiring uses 18AWG BLK conductors. All wiring must comply with applicable local electrical codes.

Q: Where can I get technical support for the e L-O-X® Series?

A: Contact ROSS Controls at 1-800-GET-ROSS or visit www.rosscontrols.com. The complete e L-O-X® Series Operating Instructions (Doc ID 410) are available for download from the ROSS document library.

Q: What is the three-phase configuration of the e L-O-X® Series?

A: The e L-O-X® Series is configured for three-phase power with line connections L1, L2, L3 on the incoming energy source side and T1, T2, T3 on the outgoing machine load side. Ground connections are provided at both input and output for protective earth continuity.