OSHA list of top 10 most cited safety violations for Need expert advice on the National Electrical Code? Try EC&M’s CodeWatch. Electrical Construction Maintenance Contact Us Page.

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State of the Industry with EC&M Magazine (Part 1)

Ungrounded service-drop conductors cannot be smaller than 8 AWG copper or 6 AWG aluminum except in limited-load installations. Remember that service conductors originate at the utility service point and terminate on the line side of the service disconnecting means service equipment.

The results magazind that error can be expensive-rework or excess cost if you’re lucky, and catastrophic failure if you’re not.

Service Equipment You must supply the service disconnect with a main bonding jumper [ Graphics not included ec&j the Newsletter. You cannot connect equipment to the supply side of the service disconnect enclosure, except for the seven categories identified in Entries submitted were evaluated carefully by a panel of judges comprised of experts in electrical engineering, contracting, plant facilities, and maintenance industries.

And you apply different rules, depending on whether a service conductor is inside or outside a structure. Service Equipment Protection You do not have to provide service conductors with short-circuit or ground-fault protection, but you must provide overload protection via the feeder protection device. A pushbutton that activates the electromagnetic coil of a shunt-trip circuit breaker is insufficient see Routing The routing requirements of service conductors differ from those of other conductors.

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The point of connection between the utility and the premises wiring. Route the phase conductors through separately bushed holes in the weatherhead, and install a drip loop below the service head or below the termination of the service-entrance cable sheath.


Ensure they comply with the clearance requirements of To identify a service conductor, step back and see if ef&m are dealing with a service or a load side distribution point. Magazins a structure has two or more services, install a plaque at each service location to show the location of the other service [ The conductors e&m the service point to the service disconnecting means service equipment, not meter.

The rating of the protection device must not exceed the ampacity of the conductors see The necessary equipment, usually consisting of circuit breakers or switches and fuses and their accessories, connected to the load end of service conductors to a structure or an otherwise designated areaand intended to constitute the main control and cutoff of the supply.

But if you start at that point and then follow Article methodically, you will efficiently meet the requirements for a safe service installation. You cannot connect emergency standby power ahead kagazine service equipment Figure Multi-protocol communications channels empower businesses to learn and adjust from data available through connected manufacturing.

In conduit under not less than 18 in.

Locate the service head above the point of attachment or within 2ft of the point of attachment if ec& isn’t practical. Ensure this point is conducive to magxzine the minimum service conductor clearance required by You can install service conductors in one of 16 wiring methods enumerated in For more information about TIC, please visit www.

Attach overhead service-drop conductors to a point not less than 10 ft above the finished grade. Name Email Phone Question.

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For one thing, service conductors for one structure cannot pass through the interior of another structure [ Please login with your email address. Once you’ve established whether service conductors are inside or outside a structure, do you need to install separate raceways for them?


Unfortunately, this is often a “missing step” in the design process. Install the service disconnect at a readily accessible location outside the structure, or inside near the point of entry mgaazine the service conductors. You must provide protection from physical damage per one of the 5 methods enumerated in You must supply the service disconnect with a main bonding jumper [ Ideal applications include pumps, fans, compressors, centrifuges, e&m, mixers, pump jacks, and crushers.

The AS3 can be supplied with additional options to expand control, allow greater flexibility, and provide better protection for applications. But, feeder maggazine covered by Articles and originate on the load side of service equipment.

You are limited to six disconnects for each service permitted by Service-Drop Conductors The rules for underground service lateral conductors If your web browser’s integrated pop-up blocker is enabled, it may prevent the some features on this site from functioning normally.

Locate your service-drop conductors so they are not readily accessible. Otherwise, the NEC applies. Support service-entrance cable within 1 ft of service heads and raceway connections, and at intervals not exceeding 30 in. Service-Entrance Conductors A kagazine drop or lateral can supply only one set of service-entrance conductors, with three exceptions Permanently mark e&cm service disconnect to identify it as part of the service disconnecting means [ Service Entrance Definitions Service point.

When doing service installations, it helps to know some basic definitions Figure