Shortest Path Method of Measurement for GFCI Protection at Sinks

210.8 Informational Note No. 2.  For the purposes of this section, when determining distance from receptacles the distance shall be measured as the shortest path the cord of an appliance connected to the receptacle would follow without piercing a floor, wall, ceiling, or fixed barrier, or passing through a door, doorway, or window.

210.8(A)(7).  Sinks – where receptacles are installed within 1.8 m (6 ft.) from the top inside edge of the bowl.

(more…)

Shortest Path Method of Measurement for GFCI Protection of Receptacles

210.8 Informational Note No. 2.  For the purposes of this section, when determining distance from receptacles the distance shall be measured as the shortest path the cord of an appliance connected to the receptacle would follow without piercing a floor, wall, ceiling, or fixed barrier, or passing through a door, doorway, or window.

Comment:  A new Informational Note No. 2 now provides clarification on the measurement technique to be utilized when measuring receptacles requiring GFCI protection.

(more…)

Identification of Ungrounded Conductors for Existing Installations where a Different Voltage System is Added

210.5(C)(1), Exception.  In existing installations where a voltage system(s) already exists and a different voltage system is being added, it shall be permissible to mark only the new system voltage.  Existing unidentified systems shall not be required to be identified at each termination, connection, and splice point in compliance with 210.5(C)(1)(a) and (b).  Labeling shall be required at each voltage system distribution equipment to identify that only one voltage system has been marked for a new system(s).  The new system label(s) shall include the words “other unidentified systems exist on the premises.”

(more…)

Use of Tightening Torque Tools where instructions are Provided by Manufacturer

110.14(D) Installation.  Where a tightening torque is indicated as a numeric value on equipment or in installation instructions provided by the manufacturer, a calibrated torque tool shall be used to achieve the indicated torque value, unless the equipment manufacturer has provided installation instructions for an alternative method of achieving the required torque.

Comment:  Most electricians are familiar with the old adage “hand tight plus a quarter turn”,

(more…)

Limited Access to Working Space About Electrical Equipment

110.26(A)(4) Limited Access.  Where equipment operating at 1000 volts, nominal, or less to ground and likely to require examination, adjustment, servicing, or maintenance while energized is required by installation instructions or function to be located in a space with limited access, all of the following shall apply:

(a) Where equipment is installed above a lay-in ceiling, there shall be an opening not smaller than 559 mm x 559 mm (22 in. x 22 in.), or in a crawl space, there shall be an accessible opening not smaller than 559 mm x 762 mm (22 in. x 30 in.).

(more…)