Once there, click on their link to free access to the 2020 NEC ® edition of NFPA 70. See the actual NEC ® text at NFPA.ORG for the complete code section. Power distribution blocks often hold conductors of different phase, polarity or ground.īelow is a preview of the NEC ®. Power distribution blocks (suitable on the line side of service equipment) must be able to withstand opposing forces that can occur during a fault condition when the service conductor is likely to whip or move. These devices move with the spliced conductors during a high-level fault condition and have not been required thus far to be tested in the same way that a power distribution block that is bolted to the enclosure is. The post date of 2023 provides time for product safety standards to catch up and test methods to be established that will address free-floating wire splices or devices that are not necessarily meant to be connected to the enclosure but generally connect other conductors of the same polarity. Effective January 1, 2023, not just power distribution blocks, but any pressure connector or device used to splice or tap service conductors shall be marked “suitable for use on the line side of the service equipment” or equivalent. 3M DBO/B-6 Direct Bury Wire Splice Kit Conductor Size - 0.75 mm² - 2.5 mm² 100 connectors/carton.The type of splice used is called a Polaris. The electrical supply house should be able to help you with box size. The box will be long and thin if you do nose-tail connections of the wires. Given the large size of the wire, there will be certain minimum box size specs. Power distribution blocks installed on service conductors shall be marked “suitable for use on the line side of the service equipment” or equivalent You can make a splice in an appropriately sized junction box indoors.Power distribution blocks, pressure connectors, and devices for splicing or tapping service-entrance conductors shall be listed.The revised 2020 requirements specify the following: In the 2020 NEC ®, the language previously located in 314.28(E)(1) was revised and relocated to 230.46 and now applies to power distribution blocks used with service-entrance conductors regardless of the enclosure type they are used in. In the 2017 NEC ®, similar code language was added to 314.28(E)(1) with the intent to have the rules apply to power distribution blocks in any box or enclosure. Since the above code language was only found in Article 376, it was only applicable if the power distribution blocks were installed in a metal wireway. Before the code language was added, it was common practice to see any kind of power distribution block used ahead of service equipment with no regard to the suitability of the product being located on the line or load side of an overcurrent protection device. In the 2014 NEC ®, code language was added in 376.56(B)(1) to ensure that power distribution blocks installed on the line side of the service equipment were listed for the purpose. Power distribution blocks are often used for splicing service-entrance conductors in metal wireways (covered in Article 376). For help with product selection and use, consult your on-site safety professional, industrial hygienist, or other subject matter expert.Code Change Summary: New requirements were added for power distribution blocks ahead of a service disconnect. Misuse of 3M industrial and occupational products may result in injury, sickness, death, or property damage. OSHA, ANSI), as well as all product literature, user instructions, warnings, and other limitations, and the user must take any action required under any recall, field action, or other product use notice. Unless specifically stated otherwise on the applicable product packaging or literature, these products are not intended, labeled, or packaged for sale to or use by consumers (e.g., for home, personal, primary or secondary school, recreational/sporting, or other uses not described in the applicable product packaging or literature), and must be selected and used in compliance with applicable health and safety regulations and standards (e.g., U.S. Not for consumer sale or use.ģM industrial and occupational products are intended, labeled, and packaged for sale to trained industrial and occupational customers for workplace use. Contact customer service at 80 to request a certificate. Note: 3M products offered on a government contract that require country of origin representation must be certified by 3M Trade Compliance. Some products contain imported components. 3M Three-Conductor In-line Splice Kits, 5750 Series 2 of 4 Features Complete Kit everything included to make one 3-conductor splice (connector not included) 3M Cold Shrink Insulators EPDM phase insulation installs quickly, without the need for heat or special tools. Click Here to Learn More on How to Shop Cable and Wire Connectors. The designation that a product is Manufactured in the USA means the product undergoes substantial transformation in one of our U.S. For Use On 12 or 14 AWG (300V) 2 wire NM cable with ground.
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