General technical information
The APYS Projects blog explains ELV, networking and electrical topics for planning and discussion. An article cannot assess your building, wiring, network, operating conditions or applicable approvals. Have the responsible qualified professional establish the final design, safe working method and acceptance requirements.
Calculator estimates
Our free CCTV storage, electrical load, cable size, MCB/DB and UPS/inverter battery calculators return estimates based on the inputs and assumptions shown. Results are not a quotation, a safety certificate, a protection-coordination study, a guaranteed recording duration or a guaranteed battery runtime. Review the stated limits and obtain site-specific professional verification before installation or procurement.
Work safely and with permission
Electrical, fire-alarm and access-control changes can affect life safety. Network tests can interrupt services. General reading does not qualify a person to carry out hazardous work or authorise access to another person’s system. Use competent personnel, the relevant equipment instructions and the site’s approved isolation, change and testing procedures.
Examples and visual material
A diagram or table is an explanation unless it is specifically identified as an actual approved project record. Existing illustrative examples are not APYS customer measurements. Do not treat a drawing, screenshot or photograph as a test certificate. Any actual project information should be read within its stated scope and date.
Prices and product references
Any price information identifies its stated scope and date. Obtain a written quotation for the actual project. Product references help explain options and do not establish an endorsement, authorised-dealer status or manufacturer certification. Check the exact model and supported functions for the proposed use.
Corrections and legal rights
Report suspected errors through our contact page, including the relevant page and calculation inputs where useful. This disclaimer does not exclude rights or remedies that cannot lawfully be excluded, or replace the terms of an agreed APYS project contract.