{"id":1066,"date":"2025-12-14T20:51:33","date_gmt":"2025-12-14T20:51:33","guid":{"rendered":"https:\/\/duramotion.nl\/?p=1066"},"modified":"2025-12-15T07:52:18","modified_gmt":"2025-12-15T07:52:18","slug":"kabel-management","status":"publish","type":"post","link":"https:\/\/duramotion.nl\/en\/kabel-management\/","title":{"rendered":"Cable management"},"content":{"rendered":"

cable management<\/strong><\/h2>\n\n\n\n

Practice shows that cable management often receives too little attention during the planning and installation of PV systems. However, cable management is an important part of a PV system. Errors in cable management not only shorten the lifespan of the installation, but also lead to unsafe situations and higher maintenance costs.<\/strong><\/p>\n\n\n\n


So to ensure the efficiency of your installation work, it is important to give cable management the necessary attention before and during installation. In this blog we briefly explain what cable management is and which common mistakes you as an installer can avoid. <\/p>\n\n\n\n

What is cable management according to the standards?<\/h2>\n\n\n\n

Cable management is at its core about placing the most favourable cable route and tying and protecting the cables.<\/em> Unfortunately, standards do not describe much about cable management. The only standard that covers cable management for the solar industry is the NEC 110.12, which merely states that the installer should \u201cinstall electrical equipment in a neat and competent manner\u201d. Quite a broad and subjective description.
Furthermore, NEN1010:2015-part712 and the NPR state a few requirements regarding electric arcs and induction loops, and NEN1010:2015 requires that condensation must be able to drain off when cabling is routed through pipes. <\/p>\n\n\n\n

\n

\u201cWithout concrete standards for cable management, it is difficult to qualify and thus prevent faulty cable work.\u201d<\/em>\u00a0Thus Mr Franssen, director Duramotion\/Scope 12 inspector<\/strong><\/p>\n<\/blockquote>\n\n\n\n

Common mistakes and pitfalls from practice<\/h2>\n\n\n\n

\u2018Neat and competent\u2019 cable management, therefore, currently consists mainly of using your common sense. Unfortunately, not every \u201cinstaller\u201d seems to have this! Below, we describe the most common mistakes inspectors encounter in practice. Read it carefully and make sure you don't make these classic cable management mistakes (anymore)! <\/p>\n\n\n\n

1. Failure to tie up cables and connectors<\/strong><\/h3>\n\n\n\n

Possibly the #1 most common mistake: not tying up cables and connectors. Connectors are somewhat moisture-resistant but not waterproof! If connectors are not tied up, they can end up in a pool of water on a flat roof, resulting in insulation failures, short circuits or arcs. Moreover, bitumen roofing contains corrosive substances that attack the plastic housing of the plugs. So tie them up!
Also read: 3 golden entrepreneurial tips for solar installers<\/strong><\/a>
Furthermore, if cables are not tied up near the panels and\/or inverter, then the junction boxes and connector connections are subjected to unnecessary mechanical stress. This can lead to failures over the 20-25 year life of the installation. And, finally, non-tethered cables are not only more vulnerable to pest damage, it is also less efficient in terms of maintenance. All in all, non-tethering of cables is a careless and bad habit of mechanics who apparently haven't been of edge clips<\/em> have heard.  <\/p>\n\n\n\n

A connector on the roof, on the bitumen, year after year in the rain shows poor workmanship.<\/p>\n\n\n\n

2. Not using Uv-resistant tie wraps<\/strong><\/h3>\n\n\n\n

Neatness and effective maintenance require cables to be bundled and tied to wire tray. However, most installers do not consider the fact that plastic tie wraps have a limited lifespan. On a solar roof, the temperature can easily vary by 50\u00b0 to 60\u00b0 in a day. As a result, the metal parts of the solar system will shrink and expand daily, putting mechanical stress on the tie wraps. In addition, the tie wraps are exposed to (acid) rain, freezing cold and years of exposure to UV radiation. A simple nylon tie-wrap will decay after a few years under such conditions. For this reason, many used to work with P.A. 11 or 12 binders and nowadays more and more people choose the superior Uv-resistant PA 6.6 binders. <\/p>\n\n\n\n

3. Too sharp bends in cable route<\/strong><\/h3>\n\n\n\n

The bending radius for most solar cables is \u2265 4 x outside diameter. If the minimum bending radius of the solar cable is not maintained, and the installer makes the bend too sharp, this leads to internal damage of the litz copper\/aluminium wires. Damaged wires have a higher resistance which increases the temperature in cable. This shortens the life of the cable with even fire risk lurking. Too tight bends can also damage the outside of the cable. Damage to insulation material leads to higher leakage currents, (parallel) arcs, and insulation faults. So be alert to too tight bends in your cable route; this is a mistake that can be easily avoided! <\/p>\n\n\n\n

4. Cables along sharp edges<\/h3>\n\n\n\n

The \u2018cowboys\u2019 among us still lay cables unprotected along sharp edges and rough surfaces. Sharp edges can be found everywhere: along cut wire tray, rails of substructure, drilled holes, etc. Cables have reasonable mechanical tensile strength and are sturdy in that respect, but the insulation material is quite soft. So be careful when pulling and dragging cables and use sheathing and edge protectors.<\/p>\n\n\n\n

Cables along sharp edges without (jacket) tubes or edge protectors. Plus and minus not separated, conduit not watertight. (Source: Photo left RTL news, photo right Univ\u00e9)<\/p>\n\n\n\n

5. Lack of string labels<\/h3>\n\n\n\n

The number of cables can add up quickly in large business systems. Bundling and identifying cables is an important aspect of cable management. Via colour coding for the minus (black) and plus (red), the cable circuit can already be made somewhat clear, but a real professional labels the strings at the connectors on both the panel side and the inverter. This makes the work for maintenance and any emergency services safe and time-saving. <\/p>\n\n\n\n

6. Not separating the plus and minus solar cables<\/h3>\n\n\n\n

Sloppy but true: especially in the cable management of private installations, it often happens that the plus and minus cables are laid through the same penetration. This is extremely dangerous due to arc flash. Unlike AC, a DC current will never pass through zero voltage. As a result, a DC arc will not extinguish on its own, causing a fire hazard. This can be avoided by laying the plus and minus cables through two separate penetrations and\/or maintaining a distance of at least 10 cm between them.   <\/p>\n\n\n\n

The plus and minus cables are laid through the same pipe, and are therefore not separated from each other over the entire cable route (see red arrow).<\/p>\n\n\n\n

7. Installing induction loops<\/h3>\n\n\n\n

Some installers install induction loops on purpose to save on meters of DC cable, and other installers install induction loops out of sheer ignorance. In any case, installing induction loops is unacceptable for a professional installer: the presence of induction loops increases the risk of overvoltage in the PV system in the event of lightning (Faraday's law). Furthermore, an induction loop produces significant amounts of electromagnetic pollution that can disrupt nearby electronics and cell towers. To reduce the size of an induction loop, mount the forward and return cables right next to each other (taking into account sufficient separation between the plus and minus cables to prevent arcing).<\/p>","protected":false},"excerpt":{"rendered":"

cable management Practice shows that cable management often receives too little attention during the planning and installation of PV systems. However, cable management is an important part of a PV system. Errors in cable management n …<\/p>","protected":false},"author":1,"featured_media":1067,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_robots_primary_cat":"","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-1066","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"acf":[],"_links":{"self":[{"href":"https:\/\/duramotion.nl\/en\/wp-json\/wp\/v2\/posts\/1066","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/duramotion.nl\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/duramotion.nl\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/duramotion.nl\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/duramotion.nl\/en\/wp-json\/wp\/v2\/comments?post=1066"}],"version-history":[{"count":3,"href":"https:\/\/duramotion.nl\/en\/wp-json\/wp\/v2\/posts\/1066\/revisions"}],"predecessor-version":[{"id":1131,"href":"https:\/\/duramotion.nl\/en\/wp-json\/wp\/v2\/posts\/1066\/revisions\/1131"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/duramotion.nl\/en\/wp-json\/wp\/v2\/media\/1067"}],"wp:attachment":[{"href":"https:\/\/duramotion.nl\/en\/wp-json\/wp\/v2\/media?parent=1066"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/duramotion.nl\/en\/wp-json\/wp\/v2\/categories?post=1066"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/duramotion.nl\/en\/wp-json\/wp\/v2\/tags?post=1066"}],"curies":[{"name":"WP","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}