Electrical Design
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What is an RCD (Residual Current Device)? – RCB and RCCB
Residual Current Device or Residual Current Circuit Breaker – Construction, Working, Types, Rating and Applications What is an RCD? An RCD, which stands for Residual Current Device, is also known…
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Why is Copper Rod Used as Ground Rod in Grounding / Earthing System?
Why is Solid Copper Rod Preferred to use in Earthing / Grounding Instead of Iron, Steel etc.? While copper is a common choice for grounding rods, other materials like aluminum,…
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What is Ground Rod and How to Install a Ground Electrode in Grounding System?
Ground Rod in Grounding System – Size, Role, Types, Installation and Applications What is a Ground Rod? A ground rod, also known as an earthing rod, grounding rod or ground…
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What is Sag in Overhead Power Transmission Lines?
Calculation of Sag in Overhead Transmission Lines What is Sag? Sag in overhead power transmission line refers to the natural, downward curvature or dip that occurs in the power lines…
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Why is the Ground Wire Always Positioned Above the Overhead Power Lines?
Why is the Ground Wire Above the Phase Lines in the Overhead Transmission Line? The ground wire (also known as earth wire or OPGW) above the phase lines in overhead…
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How Many Poles and Towers are Situated Within a 1-km Span?
How Many Utility Poles and Transmission Towers are Located Within a 1-kilometer Distance? The number of electricity poles for distribution and towers for power transmission in a 1-kilometer distance can…
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Why are Overhead Power Transmission Lines Not Insulated?
Why Use Bare Conductors for Overhead Transmission Lines Instead of Insulated Conductors? You may have noticed that we use insulated cables for underground power transmission, as well as in industrial…
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How to Wire Twin Timer for Repeated ON-Delay in Cycle Mode?
Wiring Digital Twin Timer in Repeated ON Delay Cycle Mode In our previous wiring tutorial, we discussed how to wire a one-shot timer using a twin timer for delay. In…
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Wire Twin Timer in Repeat Cycle & One-Shot Mode for 120V/240V Motors?
How to Wire Twin Timer in Repeat Cycle and One-Shot Mode for 120V/240V Motors? A digital twin timer can be wired and configured for repeat cycle (ON-delay or OFF-delay) and…
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How to Wire Twin Timer for 120V/240V Circuits – ON/OFF Delay
Wiring Digital Twin Timer for ON/OFF Delay Operations in 120 and 240V Circuits As the name suggests, a digital twin timer performs dual operations in a single circuit. It can…
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