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  • PV Safety Labels 



    NEC and NFPA compliant safety lables for solar equipment.


    Danger - Do not disconnect!


    Labels for solar industry are compulsory based on NEC 110 – 3 (A) respective NEC 90.3 and NFPA requirements as NEC safety labels category. They have to wind-stand weather, they have to be placed visible and they have to mark the main installation components on DC side and on AC side. Special requirements are: they have to be UV protected and the ink has to be water proof. When using labels in photovoltaic projects we have to know how much we label. The requirements can be checked with local utility and we have to match all extra requirements of local fire department.

    [Tech Support]  Knowledge Base Information for: Solar Safety Labels.
    Read from Knowledge Base and download a pdf file @  Article: 101 Solar labeling systems NEC Code compliant
    Fold | Unfold [ click ]  Read more...  

    Generally we label both sections of our installation on DC site as well on AC site. On DC site we have to label the connectors along the rails where PV panels are mounted. One of the label type used with MC connectors is looking like in the picture bellow:

    Peak Power

    Another type of labels are used to identify the string or array main I-V characteristics and respective peak power values in accord to NEC regulations. Such labels are more likely to be attached on string respective array combiner box and they have to be placed very visible.

    Together with this type of labels in order to identify the cable polarity we can use labels to make sure which is the right polarity of that cable.

    On DC Side:-

    We have to rate the charge controllers if any, and we will use a very similar label as in the picture bellow:

    Rated Values

    The conduit used for home runs to DC disconnect has to be labeled with a label similar to:

    Warning Label

    Very Important! -Based on NFPA requirements a big visible label has to specific indicate that this is the main disconnect for the solar panel installation on the DC site.

    Dc Disconnect

    There are some solar PV installations with more as a single disconnect depending of the array size. NEC code may require to have for each array a DC disconnect additional to the main DC disconnect.

    All the DC disconnects are to be labeled and the type of labels are very similar to:

    Solar Disconnects

    We have to label the inverter on DC site with a label specifying the system inverter ratting values:

    Rated Values

    On the AC Site we label the distribution board to make all the operators aware that we run a double power source: AC and DC power, and we clearly mark the breaker where the invertor is connected.

    Warning Dual Power

    In this article we have used Tyco solar labels systems from Tyco Electronics, available at CelanEnergyBrands in NEC Compliant Safety Lables section.

    The information posted herein has been compiled by Clean Energy Brands from OEM product data and reputable publications. All rights reserved!

     


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