Frequently asked

The base is Gurab Zarmikh. Soumeh Sara, Tulam Shahr, Ziabar, Marjaghal, Kasma, Hendekhaleh, Taher Gurab, Nargestan and Gurabpas are inside the daily radius, usually same day or next day. Fuman, Masal, Shaft, Rasht, Bandar Anzali and Rezvanshahr are taken on by arrangement.

Call and describe the job. A good many jobs can be given a ballpark on the phone. For larger work such as a full rewire, a solar installation or a switchboard build, a site visit is needed, and after it you get an estimate itemised into materials and labour.

Yes. For loss of power, a burning smell, arcing in a board, or anything carrying a risk of shock or fire, call at any hour. If you can smell burning or see smoke, switch off at the main isolator first and call second.

Yes. The workmanship is guaranteed, and a defect in work that was done gets put right at no charge. Installed equipment carries its own manufacturer warranty, which is handed to you at completion. The guarantee period varies by job type and is agreed clearly before work starts.

Either works. If I supply, you see the list and the prices before anything is bought. If you prefer to buy yourself, you get a precise specification to shop from. The one thing not open to negotiation is the grade of cable and protective devices: substandard material does not go in.

Repeated tripping usually comes from one of three things: an overloaded circuit, earth leakage from damp or damaged insulation, or a short circuit inside an appliance. An RCD tripping means leakage, and it should be taken seriously: that device exists precisely to stop an electrocution, and it must never be bypassed. A clamp meter and insulation tester will show which circuit the leakage is on.

It depends on three things: your real consumption, the tariff you pay, and whether the system is grid-tied or standalone. A grid-tied system under a purchase agreement usually pays back faster because it carries no battery. An off-grid system with a battery bank costs more, but where there is no supply or the supply keeps failing, the comparison is not with a bill but with having no power at all. A proper estimate needs twelve months of your bills.

Yes, with the right expectation. Panels still generate under cloud, just less. What matters is that capacity is calculated from the region’s actual irradiance rather than from figures for the central desert. Gilan rain has one advantage too: it washes the array, so the efficiency loss from dust that plagues dry regions is far smaller here.

Not necessarily. In an occupied house a wireless system such as Zigbee installs without breaking anything out. A wired system like KNX makes sense in a new build or a full renovation, where its cabling goes in alongside the main wiring. Which one suits you is decided after a look at the building.

Not in the way I build them. Scene logic runs on a local controller inside the house, and the internet is only needed for remote access. On top of that, every light that becomes smart keeps a working physical switch.

Almost always, and usually without replacing the whole system. The common cause is placement: facing a sunlit window, above a radiator, or in the path of an air conditioner. Sometimes sensitivity has been left at the factory setting, or the detector was never the right one for a house with a pet. A site visit normally identifies it in the same appointment.

IP gives better image quality, more analytics, and simpler cabling because power and video share one network cable. Analogue is cheaper, and if the building already has coaxial runs it can often be upgraded without recabling. For a new install IP is usually the recommendation; for upgrading an existing system, modern analogue frequently makes more sense.

As long as you need. That number is what sizes the disk. For a home, two to four weeks is usually sensible, since you may only notice something after a trip away. For a shop or warehouse the same range normally covers it. The capacity required is calculated from camera count, recording quality and retention, and quoted to you.

Usually not. If the existing cable is sound and of the right type, a new unit goes straight onto it with nothing broken out. The cable gets tested before anything is proposed. Only where telephone cable was used, or the run has been damaged, does it need replacing.

Three things: calculating the prospective fault current and choosing breakers rated above it, discrimination between the main device and the outgoing ways, and respecting clearances and ventilation. Beyond that, numbered conductors and the drawing fixed inside the door, which is what makes a repair years later take twenty minutes instead of a day.

Yes, and plenty of people do exactly that: before buying a house, or for a second opinion on somebody else’s quote. The survey and report are a standalone service, and if you take the work elsewhere afterwards, the report with its measured figures is still yours.

Yes. Abnormal consumption is usually one of a few things: earth leakage through perished insulation or damp, a faulty appliance running continuously, a failed heating element in a water heater or air conditioner, or more rarely an unauthorised connection. Clamping each circuit separately shows where the current is going, and the culprit normally turns up in that same visit.