Installation Guide for UNIRAC models including: 185RLM1, 168RLM1, SHCPKTM1, SBUTYLM1, LUGMLPE1, WRMCLPD1, RLSPLCM2, 185RLM1 NXT Rail Raceway System, 185RLM1, NXT Rail Raceway System, Rail Raceway System, Raceway System, System
Unirac NXT UMOUNT 185RLM1 185" (15') Mill Rail
RAIL RACEWAY INSTALLATION GUIDE UNIRAC Code-Compliant Installation Manual © 2023 by Unirac, Inc. All rights reserved. UNIRAC welcomes input concerning the accuracy and user-friendliness of this publication. Please write to publications@unirac.com. PUB2023NOV20 RAIL RACEWAY INSTALLATION GUIDE TABLE OF CONTENTS INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 SYSTEM COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 RAIL INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 STRUCTURAL SPLICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 WIRE MANAGEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8 RAIL RACEWAY INTRODUCTION 1 INSTALLATION GUIDE PAGE INTRODUCTION The NXT Rail Raceway System is a cutting-edge solution designed to meet the rigorous standards set forth by NEMA VE 1-2002/CSA C22.2 No. 126.1-02. This manual serves as a comprehensive guide for installers to install NXT Rail as a wire raceway. The NXT Rail is an aluminum, non-ventilated channel. It is a component of the NXT UMOUNT racking system, with UL2703 design load ratings of 37 psf down, 20 psf up, and 7.5 psf downslope Before proceeding with the installation, it is imperative to thoroughly review and have a clear understanding of the installation procedures outlined in this manual. This will ensure that the NXT Rail Raceway System is installed correctly and meets all regulatory requirements. INSTALLER'S RESPONSIBILITY · Ensure that NXT Rail Raceway System and other products are appropriate for the specific installation and are designed for the installation environment. · Comply with all applicable local or national building and fire codes, including any that may supersede this manual. · Ensure provided information is accurate and appropriate. Issues resulting from inaccurate and inappropriate information are the installer's responsibility. · Ensure the system is grounded and bonded to meet the requirements of the National Electric Code. · Ensure routine maintenance of a module or panel shall not involve breaking or disturbing the bonding path of the system and all work must comply with nation- al, state and local installation procedures, product, and safety standards. · If loose components or loose fasteners are found during periodic inspection, re-tighten immediately. Any components showing signs of corrosion or damage that compromise safety shall be replaced immediately. · Ensure bare copper grounding wire does not contact aluminum and zinc-plated steel components, to prevent risk of galvanic corrosion. · Review module manufacturer's documentation for compatibility and compliance with warranty terms and conditions. · Use only Unirac parts or parts recommended by Unirac; substituting parts may void any applicable warranty. · Installers shall refer to the NXT UMOUNT installation manual and this manual for complete installation instructions. RAIL RACEWAY SYSTEM COMPONENTS 2 INSTALLATION GUIDE PAGE STRONGHOLD BUTYL RAIL FLASHKIT PRO STRONGHOLD ATTACHMENT KIT ATTACHMENT KIT MLPE AND LUG CLAMP WIRE MANAGEMENT CLIP RAIL SPLICE NOTE: · Follow instructions provided in NXT UMOUNT installation manual to install roof attachments like FlashKit Pro, Stonghold Attachment Kit, and Stonghold Butyl Attachment Kit. · FlashKit Pro, Stonghold Attachment Kit, and Stonghold Butyl Attachment Kit are not a part of the ground bond path PART DESCRIPTION FLASHKIT PRO STRONGHOLD ATT KIT STRONGHOLD BUTYL ATT KIT RAIL MLPE AND LUG CLAMP WIRE MANAGEMENT CLIP RAIL SPLICE PART NUMBER 004055M (Mill) 004055D (Dark) SHCPKTM1 (Mill) SHCPKTD1 (Dark) SBUTYLM1 (Mill) SBUTYLD1 (Dark) 168RLM1 (Mill) 168RLD1 (Dark) LUGMLPE1 WRMCLPD1 RLSPLCM2 RAIL RACEWAY RAIL INSTALLATION 3 INSTALLATION GUIDE PAGE POSITION RAIL ONTO RAIL CLAMP: With the bolt in the pre-assembled (loose) position, Insert the rail flange on one side of the clamp groove. Then click-in the other side of the rail into the clamp groove. CAUTION Do not tighten the rail clamp before putting in the rail. TIGHTEN RAIL ONTO RAIL CLAMP : Adjust the rail height as needed until rail alignment is complete and tighten bolt. TORQUE VALUE: 20 ft-lbs. CAUTION Rail clamp must be flush to the L-foot and positioned below the flange at the top of the L-foot. RAIL RACEWAY SPLICE INSTALLATION (IF REQUIRED PER SYSTEM DESIGN) If your installation uses NXT UMOUNT Rail Splice, attach the rails together either before installing the rail or after. Use marking on the splice for centering the connection. 1. To install, slide the splice into the rail on each rail and drag it to the center of the marking. 2. Tighten both bolts on each rail with an impact drill, pressing firmly until the bolthead is flush against the splice and torqued to 15 ft-lbs. 3. Installation is complete when the bonding hardware penetrates the opposite side of the rail, and the assembly torque is achieved. TORQUE VALUE: 15 ft-lbs. Do not use Anti-Seize. CAUTION · If assembling splice directly on roof, take care to prevent bolts from penetrating roof covering. · While installing the splice, ensure either of the rails is not offset from the center marking. 3/16" MAX STRUCTURAL SPLICE 4 INSTALLATION GUIDE PAGE 0 to 3/16" gap between rails 3" 3" Note: 1. Maximum gap between rails should not exceed 3/16" at splice connection 2. Splice certified for single-use only RAIL RACEWAY WIRE MANAGEMENT 5 INSTALLATION GUIDE PAGE INSTALL MLPE & LUG CLAMP: Insert the rail nut in the rail by pinching the flaps of the plastic clip with thumb and middle finger, while pressing bolt head down with pointer finger. Rotate the clamp 90 deg in clockwise or anticlockwise in the rail and release the flaps when aligned with rail. Ensure that the rail nut is engaged in the rail profile. SYSTEM GROUNDING WITH MLPE & LUG CLAMP: Once the rail nut is engaged in the rail profile. Align the ground wire in the depression of the washer. Tighten bolt. TORQUE VALUE: 6-8 AWG SOLID COPPER: 12 ft lbs. INSTALL MICROINVERTER WITH MLPE & LUG CLAMP: Once the rail nut is engaged in the rail profile. Install microinverter onto rail. Engage with bolt and tighten to secure. TORQUE VALUE: 12 ft-lbs. Quick Tip: To remove the MPLE clamp from the rail, use a tool to pry-open the rail to release the clamp. Note: MLPE & Lug Clamp cannot be used to simultaneously mount a MLPE and ground wire. RAIL RACEWAY INSTALL WIRE MANAGEMENT CLIP: Wire clip retains the wires in the rail channel as necessary. WIRE MANAGEMENT 6 INSTALLATION GUIDE PAGE STEP 1: Press fit the clip onto the rail flanges as shown in above figure to install. STEP 2: Ensure that the clip base is seated on the rail flange. NOTE: See page 7 for NXT Rail Raceway Fill options Wire management clip installed on the roof Follow instructions provided in NXT UMOUNT installation manual to complete the system installation. RAIL RACEWAY WIRE MANAGEMENT 7 INSTALLATION GUIDE PAGE NXT Rail Raceway Fill As per NEC Article 392, minimum cable fill cross sectional area is 2.1 in². Total sum of all cable cross sections installed in Cable Tray/Rail should not exceed 30% of minimum cable fill. The NXT Rail Raceway always maintains a gap above the roof surface and does not require additional temperature derating. Review and calculate conductor ampacity per NEC Section 310.15 as required by local codes. NXT Rail Raceway Fill options that meet 30% fill: CABLE TYPE PV Wire Enphase Q Cable SIMILAR CABLES SIZE 12 AWG 10 AWG #N/A QUANTITY 12 9 6 OPTION 1 2 3 4 COMBINATIONS OF CABLES Enphase Q Cable (Qty) PV Wire 12AWG (Qty) 2 0 2 10 4 6 4 0 PV Wire 10AWG (Qty) 6 0 0 4 WARNING DO NOT USE RAIL AS A WALKWAY, LADDER OR SUPPORT FOR PERSONNEL. USE ONLY AS A MECHANICAL SUPPORT FOR PV MODULES, WIRES AND CABLES. AVERTISSEMENT! NE PAS UTILISER LE RAIL COMME PASSERELLE, ÉCHELLE OU SUPPORT POUR LE PERSONNEL. UTILISER UNIQUEMENT COMME SUPPORT MÉCANIQUE POUR LES MODULES PHOTOVOLTAÏQUE, FILS ET CÂBLES ÉLECTRIQUES.Adobe InDesign 19.2 (Windows) Adobe PDF Library 17.0