JUNCTION AND TERMINATION MARSHALLING BOXES TO CABLE OPERATING

Author of this article BGD:
All junctions, termination and marshalling boxes shall be of substantial sheet steel construction, having enclosure classification in accordance and fitted with external fixing lugs and finished in accordance with this Specification for cleaning, painting and finishing. The boxes shall allow ample room for wiring, with particular regard to the deployment of wires from the point of entry.

Outdoor boxes shall have internal anti-condensation heaters and stay bars fitted to doors. Indoor boxes shall be designed such that any condensed water cannot affect the insulation of the terminal boards or cables. No cables shall be terminated into the top of outdoor boxes unless specifically approved by the Engineer.

Each box shall be complete with suitably inscribed identification labels.

Any outdoor boxes, cubicles etc containing instruments or meters shall have glazing suitable to permit the visual examination of these.

Covers shall be arranged for padlocking and padlocks with keys shall be supplied. Cast iron boxes shall have bolted lids requiring the use of special keys or spanners for removal.

All boxes shall be provided with adequate earthing bars and terminals.

Notwithstanding information supplied by the Engineer, the Contractor shall, as each box is completed or at intervals as requested by the Engineer, supply to the Engineer copies of accurate termination or destination charts showing the as-fitted arrangement of cables and cores in each box. The Contractor shall, following the Engineer’s approval, fit one plastic laminated copy of the appropriate chart to the interior of each box.
Reactions: Location: Mirpur, Dhaka, Bangladesh

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Which one is more dangerous either DC or AC power, especially when it shocks a human body. Other way we can say, if we can take the same amount of AC and DC current onto our body which one would hurt us more?
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What is DC System?What Is AC System?DC or Direct Current could be defined as the one direction or unidirectional flow of current. Current does not change its flowing direction, only flows in one direction. The amplitude of voltage and current may vary over the time but flow of direction always unchanged. Plot of Direct Current Waveform AC or Alternating Current could be define as opposite the DC, changes direction periodically. Not only changes, periodically reverse direction. The amplitude of voltage and current vary and reverse over the periodic.




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