More and more insurance companies refuse to provide 60 amplifier services to their families,Knob and tube wiring,In some casesEven aluminum wiring.Does this mean that these types of components or systems are absolutely dangerous?No.Like all electrical components.They may be in danger that they do not meet certain minimum requirements,But they can be as safe as everyone else.Consumer division Canada Insurance Bureau Business Information Bank 1800-387-2880, there are some questions that can be answered about how to get an insurance home equipped with a 60 amp service,Knob and tube and aluminum wire.Most of the standard-sized houses built before 1960s are equipped with 60 amps electrical service.The scale of this service is very suitable for the needs of life at that time.However,The search for convenience and improved lifestyles has generally increased the demand for electrical systems in today's homes.A common misconception is that peace (size,or capacity)The electrical service of a home is determined by checking the grade of the main circuit breaker or fuse or on the panel.This method of determining the size is full of the rating problem of the circuit breaker,Fuses and panels may be related to the size of electrical services,But in many cases, they don't.The panel may have been upgraded without upgrading the service wire.The size of the electrical service is by Capacity (capacity)Incoming Service wire.The only reliable way to determine the size of the service is to observe and correctly identify the size of the incoming wire and related equipment (mast,meter base,etc.).It is becoming a common belief that less than 100 amps of electrical service is not enough,So it's not safe,They have to upgrade.Smaller electrical services,If 60 amps a is not necessarily unsafe, there is no clear shortage.60 amplifier service, however,Limit the number of devices that can be used at any time.For safety and practical purposes, the adequacy of power services should be judged based on the size of the potential or expected load.To some extent, the load is determined by the size and number of circuits in the home and the size of the home.A sign that the service is undersized is required to apply to the main fuse or circuit breaker switch that it is blowing or popping up.If the main fuse or circuit breaker is affected,The service may be owe size.If the service is undervalued due to current demand,Increasing the size of the service is an option;Another way is to reduce the number of heavy objects such as ovens,Clothes dryer or water heater.Central air-The air conditioner will also generate a large current, and electrical services may need to be upgraded during installation.Another common belief is that if a separate circuit breaker pops up or fuse blows regularly,The service needs to be upgraded.The problem of a single circuit breaker or fuse only indicates that there is a problem with the circuit involved, most likely,It is designed to load heavier than it is.Service upgrades do not necessarily solve this problem.What may be needed is to reduce the load on the affected circuit,It is possible to introduce another circuit to the desired area.Knob and tube wiring is a common wiring until 1940s, sometimes used until 1950s.The nick-The name comes from the ceramic knob for isolating and protecting the wiring operation and the ceramic tube is used to protect the wire through the potential abrasive material (Mainly wooden beams,studs etc.)Unlike the subsequent cabling system, all wires in operation are enclosed in the cable,Two wires (Black, hot and white, neutral)Run separately, only on the terminal (switch,receptacle,fixture,Junction boxes, etc.).The Knob and tube wiring do not provide the ground of the third wire, so it is considered an unsafe kitchen,bathrooms,Laundry and outdoor.In other areas,Knob and tube wiring, complete sheath under good conditions,Appropriate protection from damage,And this is not overloaded by extended periods, which may cause it to become vulnerable,There should be no increase in security risks.In addition to the previous problems,The main risk of Knob and tube wiring,it seems,Is the relative accessibility of amateur repairsUpgrade and maintain.It is not uncommon to see the Knob and tube wiring of a system, with a history of amateur work (Bad connection,Not running fixed,Unprotected wiresetc.).If a house does have knobs and tube wiring it should be checked to make sure it is properly installed and in good condition.Note:Many old homes have some wiring upgrades with the original installed knobs and tube wiring.Although modern cabling is visible in many areas,Many knobs and tube wiring may still be in place and hidden under the floor,Above the ceiling and back wall.If a few,but not all,The circuit in bad condition they can replace the whole house without rewiring in the end.However,If most or all of the circuits are in bad condition,It could be a more economical home for complete rewiring.Rewiring can also make the electrical system more convenient as new circuits can be designed to accommodate the homes of occupants of the current lifestyle.