circuits and equipment operating at less than 50 volts
TRANSCRIPT
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Name : Abikrisna Rekasina Ivanov
The Instrument Installation
Summary of Article 720
(Circuits and Equipment Operating at Less than 50 Volts)
Scope
This article covers installations operating at less than 50 volts, direct current or alternating
current. Except for installations that has covered in articles 411 (Lighting Systems Operating
at 30 Volts or Less), 551 (Recreational Vehicles and Recreational Vehicle Parks), 650 (Pipe
Organs), 669 (Electroplating), 690 (Solar Photovoltaic Systems), 725 (Class 1, Class 2, and
Class 3 Remote-Control, Signaling, and Power-Limited Circuits.), and 760 (Fire Alarm
Systems).
Hazardous classsified area
For installations in hazardous classsified area, should be comply with appropriate provisions
of article 500 (Hazardous (Classified) Locations, Classes I, II, and III, Divisions 1 and 2)
through 517 (Health Care Facilities).
Conductor
Conductor must be equivalent or bigger than no.12 copper. Conductor for appliance branch
circuits that supplying more than one appliance or appliance receptacle must be equivalent or
bigger than no.10 copper.
Lampholders
The rating of standard lampholders must be not less than 660 watts.
Receptacle Rating
The rating of receptacle must be not less than 15 amperes.
Receptacle Required
We must use receptacle that has minimum rating 20 amperes for kitchen, laundry, and other
location of portable appliance are likely to be used.
Overcurrent protection
The Overcurrent protection should be comply with article 240 (Overcurrent Protection).
Batteries
The installation of batteries must be comply with article 480 (Storage Batteries).
Grounding
The grounding should be comply with article 250 (Grounding).
Mechanical Execution of Work
We must install a circuit that operate less than 50 volts in a neat and workmanlike manner.
The cable must be resistant of the building’s structure, so the cable will not damaged by the
structure.