Hellermantyton ratchet clamp.
HellermannTyton’s Wire Management for Single Axis Trackers white paper has been updated to include extensive commentary on bifacial modules as well as modules with split J boxes. The publication provides industry insights and guidance on best practices for installers, site owners and MROs.
“As the utility scale solar market evolves, so do wire management strategies,” said HellermannTyton Product Marketing Manager Nick Korth. “This addendum builds on a document many of our customers have found useful.”
In terms of bifacial modules, they write:
In a typical design, the lead wires as well as the home run cables can run perpendicular anywhere across the back of a solar module. With bifacial, the goal is often to run the wires as close to the top or the middle (along the torque tube) as possible. This presents a challenge, since it requires multiple attachment methods and a variety of wire management parts. Typical module frame attachment methods are often impossible due to infrastructure from the Module Interface Bracket or short module lead wire lengths. Attaching to the torque tube is often one of the few viable options. A round torque tube is approximately 4″ in diameter. Doing the math, the circumference is calculated π x diameter, which gives us 12.56″, while a 4×4 square torque tube has a 16″ circumference.
and ChoiceThere is much more on the topic within the white paper. In addition to the added chapter, the white paper covers:
• End-of-row wire management and why a long-term plan is critical for this area.
• Choosing the correct material to match the hazard and environment of a solar site.
• Wire management options along the modules, torque tube and module interface brackets.
— Solar Builder magazine
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