Old wiring - knob and tube

Old wiring - two wire plastic-sheathed cable 

Old wiring - armored cable 

a. Outer plastic sheath

b. Woven copper shield

c. Inner dielectric insulator

​d. Copper core

Analog electric meter

Digital electric meter

​professional wiring methods

This is the most exciting part of being an electrician. What would happen if electricians did not take great pride in this area of construction? Or having electricians installing electrical projects without understanding electrical fundamentals and following the principles of the national electrical codes?

Ohms Electrical Construction enjoys every aspect of electrical construction. Let's talk about electrical materials, electrical codes and electrical installations. How many of you knows that the electrical industry holds the record of manufacturing the largest variety of different electrical products world wide? Ohms Electrical Construction is on top of the newest and the latest products used through the nation. As safer and smarter electrical apparatus are manufactured, not knowing your materials can be very confusing for those of you who are not in the electrical field. With over 17 years of experience, we have witnessed electrical materials uses effectively and some cases you would say who did it and why. No need to worry Ohms Electrical Construction is here. Our electricians understand  how to use the right materials to perform any task indoor or outdoors to with stand water, sunlight, or even the most severe storms making your building safe and secure.

  • ​Interior / Exterior wiring as per building codes

    Building code, or the National Electrical Code (NEC) is a regionally adoptable standard for the safe installation of electrical wiring and equipment in the United States which can be and often is adopted by states, municipalities and cities in an effort to standardize their enforcement of safe electrical practices within their respective jurisdiction.

  • ​​Panel boxes installations and upgrades

    A panel box, also referred to as a distribution board or a breaker panel,  is a component of an electricity supply which divides an electrical power feed into subsidiary circuits, which providing a protective fuse or circuit breaker for each circuit. Breaker are usually arranged in two columns and numbered from left to right, along each row from top to bottom. Each row is fed from a different phase (A, B, and C below), to allow 2- or 3-pole common-trip breakers to have one pole on each phase. In North America, it is common to wire large permanently installed equipment line-to-line. This takes two slots in the panel (two-pole) and gives a voltage of 240V if the supply system is split phase and 208V if the supply system is three phase. Below is how to number breakers in North America:


  • ​​Electric meters wiring and installation

    An electric meter, or energy meter, is a device that measures the amount of electric energy consumed by a residence, commerce, or an electrically powered device.

    Periodic readings of electricity meters establishes billing cycles and energy used during a cycle.

    In settings when energy savings during certain periods are desired, meters may measure demand, the maximum use of power in some interval. "Time of day" metering allows electric rates to be changed during a day, to record usage during peak high-cost periods and off-peak, lower-cost, periods. Also, in some areas meters have relays for demand response load shedding during peak load periods.


  • Telephone - Coaxial cable, satellite - Swimming pool wiring and installation

    Coaxial cable, or coax, is a type of cable that has an inner conductor surrounded by a tubular insulating layer, surrounded by a tubular conducting shield. Many coaxial cables also have an insulating outer sheath or jacket. Coaxial cable differs from other shielded cables used for carrying lower-frequency signals, such as audio signals, in that the dimensions of the cable are controlled to give a precise, constant conductor spacing, which is needed for it to function efficiently as a radio frequency transmission line.

    One advantage of coaxial over other types of radio transmission line is that in an ideal coaxial cable the electromagnetic field carrying the signal exists only in the space between the inner and outer conductors. This allows coaxial cable runs to be installed next to metal objects such as gutters without the power losses that occur in other types of transmission lines. Coaxial cable also provides protection of the signal from external electromagnetic interference.

  • Old wiring solutions​​​

    Here are some wiring systems you'll find in older homes: 

    Knob and Tube: a cloth-covered hot wire and a neutral wire, which run parallel about a foot apart. Ceramic knobs anchor the wires to the house framing; ceramic tubes are used where wires cross or penetrate framing.
    => Caveats: Cannot be grounded or spliced into a grounded circuit. Its soldered connections may melt if too much current flows through them. Rewire or disconnect any circuits covered with building insulation; it causes this wiring to overheat. Knob and tube wiring may be covered with building insulation, which causes overheating.

    Armored Cable (Bx): The successor to knob and tube. A flexible steel sheath covers hot and neutral wires, which are insulated with cloth-covered rubber. The sheath provides a ground, so grounded receptacles are easy to retrofit.
    => Caveats: Sheath must be anchored securely to a metal outlet box. Check condition of insulation every five years or so; it degrades over time, as shown above, or if too much current is allowed to flow through the circuit. 

    Armored cable insulation should be checked every 5 years or so.

    Two-Wire Plastic-Sheathed Cable: An early PVC-insulated (Romex) wire. 
    => Caveats:Plastic is easily damaged. Grounded receptacles cannot be retrofitted to this wire. 

    Grounded receptacles cannot be retrofitted to two-wire plastic-sheathed cables

  • ​​Ceiling fan - Air conditioner wiring and installation
  • Smoke alarm and carbon monoxide detector wiring and installation
Manual / Automatic switches for all applications
Manual / Automatic switches for all applications