Electrical Standard Library
The standards behind every ElecCalcPro calculation — Thai Electrical Code, IEC, TIS and utility rules — with what each covers and where we use it.
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12 standards
EIT 2001-56
Thai Electrical Code (Electrical Installation Standard for Thailand)
มาตรฐานการติดตั้งทางไฟฟ้าสำหรับประเทศไทย พ.ศ. 2556
The national wiring rules published by the Engineering Institute of Thailand. Sets the requirements for designing and installing low- and high-voltage electrical systems in buildings, and is the reference used by MEA and PEA for connection approval.
Used in 4 ElecCalcPro pages →
IEC 60364-5-52
Low-voltage electrical installations — Selection and erection of electrical equipment — Wiring systems
The international basis for cable current-carrying capacity: reference installation methods, tabulated ampacities, correction factors for ambient temperature and grouping, and the voltage drop method in Annex G.
Used in 2 ElecCalcPro pages →
IEC 60364-4-43
Low-voltage electrical installations — Protection for safety — Protection against overcurrent
Coordination between conductors and overcurrent devices: the Ib ≤ In ≤ Iz overload condition, the conventional tripping current check, and short-circuit protection of conductors (k²S² ≥ I²t).
Used in 1 ElecCalcPro page →
IEC 60364-5-54
Low-voltage electrical installations — Earthing arrangements and protective conductors
Earth electrodes, earthing conductors and protective conductors, including the adiabatic method for sizing protective conductors from fault current and disconnection time.
IEC 60909-0
Short-circuit currents in three-phase a.c. systems — Calculation of currents
The equivalent voltage source method for calculating initial symmetrical, peak, breaking and steady-state short-circuit currents, with impedance correction factors for network feeders, transformers, generators and motors.
IEC 60228
Conductors of insulated cables
Classes of copper and aluminium conductors and their maximum DC resistance at 20 °C — the basis for voltage drop and loss calculations.
Used in 2 ElecCalcPro pages →
IEC 60898-1
Circuit-breakers for overcurrent protection for household and similar installations
Miniature circuit-breakers (MCBs) for household and similar use: preferred rated currents, B/C/D tripping characteristics and rated short-circuit capacity.
Used in 2 ElecCalcPro pages →
IEC 60947-2
Low-voltage switchgear and controlgear — Circuit-breakers
Industrial circuit-breakers (MCCB and ACB): ultimate and service short-circuit breaking capacities Icu / Ics, short-time withstand and utilization categories.
Used in 1 ElecCalcPro page →
IEC 60502-1
Power cables with extruded insulation for rated voltages of 1 kV up to 3 kV
Construction and testing of LV power cables with extruded insulation, including the XLPE (CV) cables rated by EIT tables 5-21 and 5-27 to 5-33.
Used in 1 ElecCalcPro page →
TIS 11-2553
PVC insulated cables of rated voltages up to and including 450/750 V
มอก. 11-2553 สายไฟฟ้าหุ้มด้วยพอลิไวนิลคลอไรด์
The Thai industrial standard for PVC building wire and cords, harmonised with IEC 60227 — the source of the 60227 IEC 01 / 10 / 53 codes and the NYY, VAF and VCT types used across Thailand.
Used in 2 ElecCalcPro pages →
MEA / PEA service rules
Utility requirements for low-voltage service connections
ข้อกำหนดการไฟฟ้านครหลวงและการไฟฟ้าส่วนภูมิภาค
Meter sizes, maximum service overcurrent device ratings and minimum service conductors set by the Metropolitan and Provincial Electricity Authorities, as tabulated in EIT Tables 3-4 and 3-5.
Used in 2 ElecCalcPro pages →
NFPA 70 (NEC)
National Electrical Code
The US wiring code. Its standard ampere ratings (240.6) and motor full-load current tables are widely used alongside IEC practice in Thailand.
Used in 1 ElecCalcPro page →