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Most countries and communities adopt internationally recognized Codes for this purpose. Because of the cost and complexity of developing and maintaining such codes, state and local governments typically adopt nationally recognized model codes, often amending them to reflect local construction practices, climate and geography. Design Wind Pressure: We = q ref C e (Z e) C pe – q ref C e (Z i) C pi.īy Yared Gebremeden Virtually all residential construction must adhere to comprehensive building codes and standards governed by local and state laws. This requirement need not apply to final sub- circuits supplying equipment such as cranes or personnel lifts where interruption of supply is a risk to safety.Refer to Chapter 3 of ECBS-1 (Ethiopian Building Code Standards) – Wind Actions.
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This also applies to the final sub-circuits in transportable structures. Every final sub-circuit including lighting and socket-outlets must be protected by an RCD with a rated tripping current not greater than 30mA. Every final sub-circuit must be protected by a circuit breaker except final sub-circuits exceeding 50A, which may be protected with high rupturing capacity (HRC) fuses.Īn RCD is a ‘safety switch’ fitted to an electrical circuit to reduce the risk of electric shock or electrocution. Associated flexible cords used in construction work.Ĭonstruction work referred to in this industry standard means the construction, renovation and demolition of all types of buildings and structures including residential buildings and any related excavation work.Ĭircuit breakers provide protection against circuit overload and fire.Fixed and/or portable electrical apparatus,.
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