How to calculate the size of MCBs while designing a circuit

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To decide the number and types of MCB/ ELCBs in your office/ home, you must note down the number of electrical equipment used in your premises. Then start dividing them into different electrical branches (on the basis of your wire size calculations and cost effectiveness). Example 02 — Click here   — For JOB Application, please mail at pratham6138@gmail.com —   Example 01 For example, suppose one building has 8 rooms with following equipment in each room. Room-1 3 X 40 W Bulb (NC) 1 X 60 W F an (NC) Room-2 2 X 40 W Bulb (NC) 1 X […]

Need a freelance PLC programmer

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We require one PLC programmer for a project on freelance basis. Please update your resume in the career section or just paste your e-mail ID in the comments. We will give you a call. Experience required : 2 yrs minimum Freelance salary : INR 10,000-30,000 for this project. Once the work is awarded, we would need the project in next 10-12 days along with documented Ladder logic. Requirement ends 25th Jan 16, please apply on or before.   Regards, B.D. (Managing Partner)  

MCB types based on Number of poles

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Types of MCBs used (Poles) SP – Single Pole In Single Pole MCB, switching & protection is affected in only one phase. Application: Single Phase Supply to break the Phase only. SPN – Single Pole and Neutral In Two Pole MCB, switching & protection is affected in phases and the neutral. Application: Single Phase Supply to break the Phase and Neutral. DP – Double pole In Two Pole MCB, switching & protection is affected in phases and the neutral. Application: Single Phase Supply to break the Phase and Neutral. TP – Triple Pole In Three Pole MCB, switching & protection is affected in […]

IP Codes

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IP Rating:  IP Rating First Digit Second Digit Third Digit (Optional) Solid Objects Protection Liquids Protection Mechanical impacts 0 No special protection No protection. No protection. 1 Protected against solid objects greater than 50mm in diameter ( such as large part of the body like hand) Protection against vertically falling drops of water e.g. condensation. Protects against impact of 0.225 joule (150 g weight falling from 15 cm height) 2 Protected against solid objects over 12 mm in diameter (person’s fingers) Protection against direct sprays of water up to 15° from the vertical. Protected against impact of 0.375 joule (250 g […]

How to calculate the size of Inverter for my home/office

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It is very common to face this question from your friend or your relatives to suggest a good inverter for their home or office. Being an Electrical Engr we can’t just suggest anything surfing the net and tell them go buy Lumious 2000 VA inverter. I faced a similar situation while selecting inverter for our RCS AutoCad coaching center recently.  Nobody wants to shell out extra money, guess we need 1250 VA and we are going to purchase 2000 VA, I won’t. I went through some books and internet blogs, I found some solutions. Wanted to share with you –> […]