IEC 60364-7-708 / 709

The cable calculator supports preliminary electrical planning by estimating cable ampacity, voltage drop and a suitable conductor size before the final technical design is confirmed.

Kaablikalkulaator: amper, mm²/mm2 ja pingelang

Arvuta kaabli ristlõige mm²/mm2, voolutaluvus amprites (A), pingelang, lühisvool, mootorid, UPS/generaator, peakaitse ja faasijaotus, EV, küttekaabel, CCTV/PoE, valgustus, päike/aku ning energiakulu ühes mobiilisõbralikus tööriistas.

Amper / Amm² / mm2Cu + Al1F + 3F + DCUPS + generaatorPeakaitse + EVCCTV + PoE

A1 Ühesoonelised juhid torus soojusisolatsioonseinas

Isoleerjuhtmed või ühesoonelised kaablid torus, mida ümbritseb soojusisolatsioon.

Näited: Soojustatud karkasssein, toru soojustuskihis.

A1 Ühesoonelised juhid torus soojusisolatsioonseinas

Isoleerjuhtmed või ühesoonelised kaablid torus, mida ümbritseb soojusisolatsioon.

Näited: Soojustatud karkasssein, toru soojustuskihis.

Paigaldusviisid

IEC/EVS-HD võrdlusviisid A1, A2, B1, B2, C, D1, D2, E, F ja G. F- ning G-variandid on eraldi, sest kaablite asetus muudab tabeliväärtust.

Tüüpilised kaablid ja mm2 suurused

  • MMJ / NYM-J — siseinstallatsioon
  • AXMK / NAYY — jaotus ja pinnas
  • H07RN-F — painduv tööstuskaabel
  • FXQJ / EXQJ — halogeenivaba

Oluline

Arvutustulemused on dimensioneerimisabi. Lõplik lahendus tuleb kontrollida projekti, standardi, kaablitootja tabelite ja kaitse tegelike ajavoolukõverate järgi.

Electrical and cable calculators in one tool

IEC 60364-7-708 / 709. Preliminary electrical calculation; verify the final result against the design, manufacturer data and applicable requirements.

Technical symbols and abbreviations: shore power, marina, caravan park, camping park, IEC 60309, IP44, IK08, RCD, RCBO, 30 mA, TN-S, PEN, EVS-HD 60364-7-708:2017+A11:2024, EVS-HD 60364-7-709:2009+A1+A11+A12:2019

Cable size, ampacity and voltage drop

Find a suitable mm² conductor size from load, length, material, installation method and temperature, then check current-carrying capacity and voltage drop.

Short circuit, protection and motor cable

Check adiabatic withstand, fault loop, protective-device operation, PE/N conductors and 3-phase motor current, starting conditions and cable size.

EV, UPS, generator, solar and energy cost

Estimate EV charger power and cable, UPS or battery runtime, generator size, solar and battery system, and appliance electricity use and cost.

Heating cable, lighting, CCTV, conduit and CPR

Calculate heating cable layout, room lighting, CCTV/PoE power and storage, conduit or cable-tray fill, and review CPR fire-class guidance.

Frequently asked questions

How do I choose a cable size?

The conductor must satisfy load current, corrected ampacity, voltage drop, short-circuit and protection checks, plus manufacturer data.

Does 2.5 mm² cable have one fixed amp rating?

No. Ampacity depends on installation method, loaded conductors, insulation, ambient temperature, grouping and the specific product.

Should voltage drop and ampacity be checked together?

Yes. A cable may be thermally adequate while its voltage drop is excessive on a long run; automatic sizing checks both.

Does this calculator replace an electrical design?

No. It is a preliminary sizing and checking aid; a competent designer or electrician must confirm the final installation data.