The legend or symbols shall show symbols or configurations and figures of devices and equipment used. Isolating switches shall be provided with a means for readily connecting the load side conductors to ground when disconnected from the source of supply. 2.30.6.11 Combined Rating of Disconnects. 2.30.5.1 Service Equipment — Enclosed or Guarded. There are charts available which specify the required size of conduit. If you had seen two black wires and a neutral leading from the pole to the house, you’re probably dealing with a three wire 120/240V system. Exception No. Please take time to read the many comments below. This is to ensure that the polarity of the appliance connection is correct, that the neutral rather than hot wire is attached to the metal case of the appliance. The neutral leads should be white not red. The service disconnecting means for ungrounded service conductors shall consist of one of the following: (1) A manually operable switch or circuit breaker equipped with a handle or other suitable operating means, (2) A power-operated switch or circuit breaker, provided the switch or circuit breaker can be opened by hand in the event of a power supply failure. Power from the generator (when running) comes in at the bottom. We are very happy with the clean look of the recessed lighting, so many exposed fixures are ugly. We installed a 250 Watt high pressure sodium light in our yard. Our electricians were astounded that we were using such heavy cable in a residence. ELECTRICAL WORKS Pipe and Fitting 20mmdia UPVC pipe pcs 84.00 20mmdia RSC conduit pcs 212.00 20mmdia RSC coupling pcs 20.50 20mmdia UPVC coupling pcs 4.50 20mmdia UPVC adoptor pcs 7.00 20mm dia. This must have been a huge overload, far beyond 20 amps. The buses on the plug-in panel boxes have a zig-zag type of arrangement which works well if your two buses are hot and you have separate neutral and ground busses – such as in the U.S. or in Manila or other Philippine cities. 5: Overload protection for 120/240-volt, 3-wire, single-phase dwelling services shall be permitted in accordance with the requirements of 3.10.1.15(b)(6). In fact, in Europe [and the Philippines], the plug on a piece of equipment can be plugged in either way! Above. (c) Remote Control. Means shall be provided to disconnect all conductors in a building or other structure from the service-entrance conductors. 2.30.1.7 Other Conductors in Raceway or Cable. This allows us to safely work on the panel box without having the utility company remove the meter. 3: Where ground-fault protection is provided for the service disconnect and interconnection is made with another supply system by a transfer device, means or devices may be needed to ensure proper ground-fault sensing by the ground-fault protection equipment. If you buy your panel box and breakers in a hardware store you’ll generally find cheaper brands such as Koten, Meiji, Royu and so forth. For that reason, the ground wire is more of a fig leaf than a real solution. However there are some big differences in materials and techniques between the USA, Europe, the U.K. and the Philippines. First, some background. 6: Where service equipment is power operable, the control circuit shall be permitted to be connected ahead of the service equipment if suitable overcurrent protection and disconnecting means are provided. Now we can discuss wiring “branch” circuits. TYPES OF ELECTRICAL SERVICE IN THE PHILIPPINES. Presumably, breakers made to be used as single-pole provide both protections in a single breaker, as do double-pole breakers used as a unit. 2.30.4.4 Wiring Methods for 600 Volts, Nominal, or Less. The meter-to-house wire is referred to as “duplex cable”. National Electrical Code of the Philippines. Exception: In a multiple-occupancy building where electric service and electrical maintenance are provided by the building management and where these are under continuous building management supervision, the service disconnecting means supplying more than one occupancy shall be permitted to be accessible to authorized management personnel only. The grounded conductor shall not be less than the minimum size as required by 2.50.2.5(c). (b) Type. Service cables, where subject to physical damage, shall be protected by any of the following: Individual open conductors and cables other than service cables shall not be installed within 3 000 mm of grade level or where exposed to physical damage. The conductors shall not be smaller than 8.0 mm2 (3.2 mm dia.) 2.30.4.11 Protection of Open Conductors and Cables Against Damage - Above Ground. All of these shown are overstuffed with wires, not an ideal situation. This works fine except that you have to carefully check the polarity of your circuits to be sure the neutral wires always connect with the neutral bus. Exception No. 4: See 5.17.2.8(a) for information on where an additional step of ground fault protection is required for hospitals and other buildings with critical areas or life support equipment. There is no right answer to the question about bringing appliances from the U.S. to the Philippines. The service disconnecting means shall be located in accordance with 2.30.6.1. 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