MEP Electrical Calculator — IEC / BS / CIBSE
MEP Electrical
Calculator
Conduit fill, panel load schedule, aur lux level — teen calculators ek jagah. MEP drawings aur site commissioning ke liye ready.
Calculator 01 — Conduit Fill
Wires Inside Conduit
Result
Conduit Fill Analysis
FILL %
0%
Limit:
Conduit Area
0mm²
Internal section
Wires Total
0mm²
All cables
Max Allowed
0mm²
At fill limit
Remaining
0mm²
Spare space
Conduit Fill Kya Hota Hai?
MEP drawings mein har conduit ka fill % 40% se below rakhna IEC/BS standard hai. Gulf mein 35% rakho — heat derating ke liye extra margin chahiye.
IEC/BS: Max 40% | NEC 3+ wires: 40% | NEC 2 wires: 31%
Typical OD: 2.5mm²=8.6mm | 4mm²=10mm | 6mm²=11.5mm
Typical OD: 2.5mm²=8.6mm | 4mm²=10mm | 6mm²=11.5mm
Cable OD manufacturer datasheet se verify karo. Armoured cables ka OD zyada hota hai.
Calculator 02 — Load Schedule
Commercial: 70-80% | Critical loads: 100%
Load Items
Result
Panel Load Summary
Total Connected
0kW
Demand Load
0kW
Total kVA
0kVA
Full Load Current
0A
Incomer MCB/MCCB
0A
Min Feeder Cable
0mm²
Load Schedule MEP Drawing Mein Kyun?
Every MEP drawing mein panel schedule hota hai. Ye table batata hai ki har circuit ka load kitna hai, demand ke baad incomer aur feeder cable ka size kya rakhe.
Demand Load = Connected x DF
kVA = kW / PF
FLC (3ph) = kVA x 1000 / (1.732 x V)
kVA = kW / PF
FLC (3ph) = kVA x 1000 / (1.732 x V)
Calculator 03 — Lux Level
CIBSE standard
Desk height = 0.85m
Datasheet se dekho
Result
Lux Calculation — Lumen Method
FITTINGS REQUIRED
0nos
Achieved Lux
0lx
Room Index K
0
UF (CU)
0
Total Lumens Req
0lm
Total Load
0W
W/m²
0
Lumen Method (CIBSE)
N = (E × A) / (F × UF × MF). E = Required lux, A = Room area, F = Lumens/fitting, UF = Utilisation Factor, MF = Maintenance Factor.
K = (L × W) / (Hm × (L+W))
Hm = Ceiling height − Work plane height
Hm = Ceiling height − Work plane height
Gulf mein LED retrofit ke time manufacturer photometric data se UF verify karo.
Is Calculator Ko Kaise Use Karein
01
Conduit Fill
Tab 01 pe jao → Conduit size aur fill limit select karo → Cables add karo (size select karo, OD auto-fill hoga) → Calculate karo. PASS/FAIL result milega with recommendation.
02
Load Schedule
Tab 02 pe jao → Voltage, PF, Demand Factor set karo → Har equipment add karo (naam, kW, qty) → Calculate karo. Incomer MCB size aur feeder cable size milega.
03
Lux Level
Tab 03 pe jao → Space type select karo (lux auto-fill hoga) → Room dimensions aur luminaire data daalo → Calculate karo. Required fittings count aur CIBSE compliance check milega.
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Frequently Asked Questions
Next size up conduit use karo. Example: 50mm FAIL ho raha hai toh 63mm pe switch karo. Ya cables ko do alag conduits mein split karo. Gulf mein 35% fill rakho extra margin ke liye — heat mein cables slightly swell karte hain aur pull karna difficult ho jaata hai.
Critical loads ke liye 100% demand factor rakho — hospital ICU, data center, fire pump, emergency lighting. In equipment pe partial load assume karna dangerous hai. Commercial office ke liye 70-80%, industrial ke liye 85-90% standard practice hai.
UF luminaire manufacturer ke photometric data (IES file ya polar curve) mein hota hai. Is calculator mein simplified UF table use ki gayi hai Room Index (K) aur reflectance ke basis pe. Accurate design ke liye manufacturer datasheet se UF verify karo. Dialux ya Relux software use karo detailed calculations ke liye.
Qatar mein IEC/BS standard follow hota hai — 40% maximum fill. Lekin site practice mein 35% rakho kyunki Gulf ki extreme heat mein cable pulling difficult hoti hai aur conduit mein thermal buildup hota hai. Abu Dhabi ADDC aur Saudi SASO bhi IEC 40% standard follow karte hain.
FLC (Full Load Current) calculate hota hai demand load se. FLC (3ph) = kVA × 1000 / (1.732 × V). Phir FLC × 1.25 = minimum MCB rating. Next standard MCB size select kiya jaata hai (16, 25, 32, 40, 63, 80, 100A etc.). 1.25x factor starting current aur motor loads ke liye margin hai.
CIBSE Code for Lighting ke hisaab se: Office general = 500 lux, Drawing office = 750 lux, Corridor = 200 lux, Toilet = 200 lux, Parking = 75 lux, Hospital ward = 300 lux (examination = 1000 lux), Retail = 500 lux, Server room = 500 lux. Gulf projects mein CIBSE standard typically specification mein mention hota hai.
VoltGuru.in — MEP Electrical Calculators — IEC / BS / CIBSE Standards — Gulf Ready