DEWA REGULATIONS FOR ELECTRICAL INSTALLATIONS PDF

STANDARDS FOR EQUIPMENT AND MATERIALS All electrical installations shall comply with the requirements of the Regulations. Relevant DEWA’s. DEWA’s requirements for electric installations in order to safeguard persons and property from hazards arising from the use of electricity. DUBAI, 23rd April, (WAM)– Dubai Electricity and Water Authority, DEWA, has issued its Regulations for Electrical Installations

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Global Affairs – UAE. A Framework for Smart The object of the regulations is to provide consultants, contractors, wiremen and installationns with a general guide for compliance with DEWA requirements for electrical installations in order to safeguard persons and property from hazards arising from the use of electricity.

The regulations, however, not neither to substitute regulationa specifications nor to serve as an instruction manual for untrained persons. It is essential that all consultants, contractors and wiremen study and abide by these regulations. This, of course, does not absolve the concerned parties from obtaining other necessary approvals from DEWA. Some of the practices followed generally in the AGCC countries have been adapted as appropriate. Consideration has been given to the prevention of fire and shock hazards as well as proper fkr and maintenance of wiring installations and equipments.

D- Typical electrical service room with 1 No cubical type L. Earth leakage protection Spacing of supports for trunking, conduits and cables Number of cables that may be installed in trunking Conduits and cable trays. Data Schedule for LV electricity meters and Transformers. Installations, wherein construction intallations High voltage sub stations is required, shall be Referred to DEWA at the preliminary design stage for incorporating any specific requirements.

The regulations are not intended to take the place of a detailed specification or to Instruct electricql persons or to provide for every circumstance. Where a difficult or Special situation arises which is not covered or allowed for in the regulations, the DEWA may be sought electrixal obtain specific advice. All equipment, apparatus, materials and accessories used in these electrical installations Shall be designed and rated for operation on this electric supply.

Appropriate protective Devices against over-voltages, fluctuations, transients and harmonics, loss of one or More phases and any unforeseen interruption shall be provided in all consumer installations as deemed essential, in addition to over load, short circuit and earth leakage protective devices. Altitude Max outdoor ambient Temp. Average over 24 hours Max.

Sea level coastal 48? Careful attention shall be paid to mechanical execution of the work in connection with any electrical installation. In case of contradiction, DEWA? Guide lines on requirements of P. F improvement is also given in section 8. V relays with electdical timer. The guidelines on requirements of UV relays are also given in section 8. A electical is not allowed to cause deviations of the voltage characteristics other than those allowed in European standards ENNov.

Any excess deviation shall be compensated by the consumer at his own cost. All installations and equipment therein, shall regulahions subject to DEWA? The first testing and inspection by DEWA may be free of charge. All installation which require re inspection and re testing may be charged for each subsequent inspection, based on the type of consumer installation, connected load, etc.

The deqa of periodic inspection and testing of an installation shall be determined by the type of installationits use and operation, the frequency of maintenance and the external influences to which it is subjected. Every installation shall also shall also be subject to periodic, random inspection by DEWA. The consumer shall arrange rectification of the defects, if anynotified by DEWA, at his own cost.

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A device, other than rwgulations using equipment, associated with such equipment or with the wiring of an installation. The temperature of the air or other medium where the equipment to be used. An item of current using equipment other than a luminaire or an independent motor.

A zone of accessibility to touch, extending from any point on a surface where persons usually stand or move about to the limits which a person regulatione reach with hand in any direction without assistance. A part providing a defined degree of protection against contact with live parts from any usual direction of access. A protective conductor providing bonding.

Cables are said to be bunched, when two or more contained within a single conduit, duct, ducting, or trunking or, if not enclosedare not separated from each other by a specified distance. A component of a support system, which consist of elements spaced at intervals along the length of a cable or conduit and which mechanically retains the cable or conduit. A cable support consisting of a continuous base with raised edges and no covering. A manufactured enclosure for the protection of cables, normally of rectangular cross section, of one side is removable or hinged.

An assembly of electrical equipment supplied from the same origin and protected against over current by the same protective devices. A device capable of making, carrying and breaking normal load forr and also making and automatically breaking, under pre —determined installaions, abnormal currents such as unstallations circuit currents. It is usually required to operate infrequently although some types are suitable for frequent operation.

The maximum current, which can be carried by a conductor under specified conditions without its steady state temperature exceeding a specified value. Installatipns equipment, which converts electrical energy into another form of energy, such as rdgulations, light or motive power.

An assembly containing switching or protective devices e.

UAE INSTALLATION REGULSTIONS_百度文库

It may also include signaling and other control devices. Means of isolation may be included in the board or may be provided separately. Insulation comprising both, basic insulation and supplementary insulation. A closed passageway formed underground or in the structure to receive one or more cables which may be drawn in.

The conductive mass of the earth, whose electric potential at any point is conventionally taken as zero. A conductor or group of conductors in intimate contact with, and providing electrical connection to the general mass of EARTH. The resistance of an earth electrode to electricall Earth. A current, which flows to installatkons, or to extraneous conductive parts in a circuit, which is electrically sound. This current may have a capacitive component, installatiojs that resulting from the deliberate use of capacitors.

Connection of the exposed conductive parts of an installation to the main earthing terminal of the installation. A protective conductor connecting the main earthing terminal of an installation to an earth electrode or to other means of earthing.

Electricity regulation in the United Arab Emirates: overview | Practical Law

A dangerous physiological effect resulting from passing an electric current through human body or live stock. An assembly of associated electrical equipment supplied from a common origin to fulfill a common a specific purpose and having certain coordinated characteristics.

An operation intended to remove, as quickly as possible, danger, which may have occurred unexpectedly. Any item of such purpose as generation, conversion, transmission, distribution or utilization of electrical energy, such as machines, transformers, apparatus, measuring instruments, protective devices, wiring systems, accessories, appliances and luminaries. Electrical connection maintaining various exposed conductive parts and extraneous conductive parts at substantially the same potential.

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A conductive part of an equipment which can be touched and which is not a live part but which may become live under fault conditions. Any influence external to an electrical installation which effects the design and safe operation of that installation. A circuit condition in which current flows through an abnormal or unintended path.

This may result from an insulation failure or bridging of insulation.

Conventionally impedance between live conductors or between live conductor and exposed or extraneous conductive parts at foor fault position is considered negligible. A current resulting from a fault. A circuit connected directly to current using equipment, or to a socket outlet or socket outlets or other outlet points for the connection of such equipment.

Equipment designed to be fastened secured in a specific location. A cable whose structure and material make it suitable to be flexed while in service. A flexible cable in which the cross- sectional area of rfgulations conductor does not exceed 4 mm? Suitable non -conductive material enclosing, surrounding or supporting the conductor. A mechanical switching device, which in the open position complies with the requirements of isolation.

An isolator otherwise is known as disconnecter. A conductor or conductive part intended to be energized in normal use, including a neutral conductor. Equipments which distribute, filter or transform the light from one or more lamp, and which include any parts necessary for supporting, fixing and protecting the lamps, but not the lamps themselves, and where necessary, circuit auxiliaries together with the means for connecting them to supply.

For the purpose flectrical the regulation a lamp holder, however supported, is deemed to be a luminaries. A combination of one or more low voltage switching devices together with associated control, measuring, signaling, protective, regulating equipment, etc.

The assembly may be type tested or partially type tested see BS part The terminal or the bar provided for the connection of protective conductors, including equipotential bonding conductors, and conductors for functional earthing, if any, to the means of earthing.

The neutral conductor of a 3 phase 4 wire system or the conductor of a single- phase installation, which is earthed at the source of supply.

Voltage by which elechrical installation or part of an installation is designated. The following ranges of nominal voltage r. Normally not exceeding 50 V a.

DEWA Circulars

Normally reyulations extra low voltage but not exceeding V a. The actual voltage of the installation may differ from the installatinos value by a quantity within normal tolerances. A current exceeding the rated value.

For conductors the rated value is the current carrying capacity. An over current occurring in a circuit, which is electrically sound. A termination of the fixed wiring intended for the connection of the current using equipment. A conductor used for some measures of protection against electric shock and intended for connecting together any of the following parts.

A mechanical switching device or association of devices intended to cause the opening of the contacts when the residual current attains a given value under specified conditions. A circuit arranged in the form of a ring to a single point of supply. An over current resulting from a fault of negligible impendence between live conductors having a difference in potential under normal operating conditions.

A device provided with female contacts, which is intended to be installed with the fixed wiring, and intended to receive a plug.