15 questions to ask a low-voltage contractor before you sign

Quotes for camera, alarm or access control systems often look similar: number of cameras, recorder model, price. The real differences hide in the details. These questions will help you compare contractors and make an informed decision.

Experience and authorisations

• 1. Which similar projects have you worked on? Ask for examples in the relevant field and scale.
• 2. Are you an authorised installer of the manufacturers you are proposing? What does that mean for warranty and support?
• 3. Do you know the standards and requirements that apply to our site (for example SI 1337, SI 1220, business licensing)?
• 4. Who will actually do the work: a permanent team or subcontractors?

Design

• 5. Will you carry out a site survey before the final quote?
• 6. What level of detail will each camera provide at its point (identification, recognition, overview)?
• 7. How many days of recording will we actually get, and based on what calculation?
• 8. Is infrastructure (cabling, cabinets, switches) included, and to what standard?

Cyber and privacy

• 9. Will the system be exposed to the internet? How will remote access work?
• 10. How will passwords and firmware updates be managed?
• 11. Will you configure privacy masking, viewing permissions and retention according to our policy?

Handover and documentation

• 12. What will we receive at handover: drawings, equipment list, addresses, passwords, training?
• 13. Is there a formal acceptance test?

Service

• 14. What does service include after installation, and what service levels are offered?
• 15. Do you provide service in all the areas where we have sites?

How to analyse the answers

A professional contractor will be happy to answer in detail, offer a site survey and clarify what is and is not included. Overly general answers ("everything is included", "we'll manage") are a sign to look further. Ask for quotes based on the same requirements document so the comparison is fair.

About price

Price depends on the number of systems and points, equipment type, existing infrastructure, height and access, standard requirements and the scope of service. An especially cheap quote may not include infrastructure, design or documentation, so compare scope, not just the total.

Example: two quotes that look alike

Quote A includes eight cameras and a recorder at a low price. Quote B includes the same number of cameras at a higher price. Asking the questions above reveals that quote A has no new cabling (reusing old, untested cables), no site survey, no documentation and no secure remote access setup; quote B includes all of these, including cabling tests and a handover report. The price difference is really a difference in scope.

A short requirements document to prepare

• The list of sites and required systems.
• Goals: what you want to see, prevent or record.
• Known standard, licensing or insurance requirements.
• The organisation's cyber and privacy requirements.
• Desired retention period.
• Schedule and on-site working constraints.
• Scope of service after installation.

A one-page document is enough for every contractor to quote on the same basis.

Warning signs

• Refusing a site survey for a non-trivial project.
• No detail of models and scope.
• General promises not covered in writing.
• Unwillingness to hand over passwords and documentation at the end.

After you choose

Hold a kick-off meeting, approve the final design in writing, and set dates in advance for the acceptance test and documentation handover.

What to check at acceptance

• All cameras work and record, and the image meets the defined level of detail, tested by day and night.
• Actual retention matches what was promised.
• Remote access works through the agreed secure method, with no open ports.
• Passwords were changed and handed over to the client.
• The alarm reports to the monitoring centre on all paths.
• Access control works according to the defined permissions.
• Documentation was delivered: drawings, equipment list, addresses, cabling test reports.
• Staff received basic training.

Only when every item is ticked is the project really finished.

A final question: what happens in five years

Ask the contractor how the system will expand, what is likely to need replacing first, and how updates will be done. A professional answer shows long-term planning.

How to compare three quotes in practice

Prepare a simple table: rows for the items above (survey, models, infrastructure, retention, cyber, documentation, service, warranty) and a column per contractor. Mark each item as included, partial or missing, and add notes. Only then compare prices. It becomes easy to see that a cheap quote lacks essential items, or that an expensive one includes things you do not need.

References

You can also ask the contractor for contacts on similar projects and ask them about quality of work, keeping to schedules and after-installation service. Ask especially how the contractor handled the first fault after handover; it is a good test of what service will look like over the years, and of the team's availability when you really need it.

Summary

The right questions prevent surprises. Zohar Cameras, with about 20 years of experience and nationwide coverage, is an authorised installer of Dahua, Hikvision, Provision-ISR, PIMA and RISCO, and is happy to answer all these questions before work begins.