Do the math before you pull the cable.
Free calculators for low-voltage installers, built for the phone in your pocket on site. Every number is sourced, every limit is stated, and every result can be sent to a coworker as a link.
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at the device
Calculators
- Camera storage & bandwidthA whole project of camera groups, multi-sensor cameras, smart codecs, RAID and drive count, and the days a recorder holds.Bitrate shown as a range
- Camera network IP plannerThe subnet a camera system needs with room to grow, and which device gets which address. Exports to CSV.RFC 950, 4632, 1918
- Voltage dropVoltage at the device, pass or fail against its minimum, longest run and smallest wire.NEC Ch. 9, Table 8
- PoE power budgetDevices against a switch, per port and in total, with cable loss and over-class flags.IEEE 802.3af / at / bt
- Off-grid solarBattery, panels and charge controller for a camera pole or job-site trailer, through the darkest month.Sandia, NREL, NEC 690
- Battery standbyStandby and alarm current to amp-hours, with fire alarm and access control kept separate.NFPA 72, UL 294
- Conduit fillHow many cables fit, by raceway and trade size, using the real cable diameter.NEC Ch. 9, Tables 1 & 4
- Cable run lengthsEthernet, PoE and HDBaseT limits, and where a switch or extender has to go.TIA-568, IEEE 802.3