Who invented the electric plug?

Perhaps not everyone knows the story of the Electric Plug span and how to select it based on the country of use.Mr. Harvey Hubbel (1857-1927) was born in Bridgetport Connecticut, he was: Inventor, entrepreneur and industrialist.

In 1904 he invented the electric power plug for the United States, later with the spread of the use of electricity both for heating and for household appliances, this new and practical connection system became necessary .

Subsequently, each country decided to develop its own plug/socket instead of following the path of unification, this is the reason why we are inundated with different types of plugs.

There have been several attempts to create the Europlug, but individual countries are extremely reluctant to apply this standard. The change, even if very slow, has already begun, the European Commission has studied and created a new electric plug; IEC 60906-1 (phases + earth 250V) and in 1986 the International Electrotechnical Commission made the new model public.

To date, no one has used this new type of plug, only Brazil has adopted it, calling it NBR. There have been successive changes; IEC 60906-2 for 125V and IEC 60906-3 for L.V.”

www. tropiland.it/spine/ it.wikipedia.org/wiki/Standard-elettrici-nel-mondo

The Europlug  is an electrical plug for domestic use flat and with two contacts, prepared for voltages up to 250 V and currents up to 2.5 A.

This model is a compromise aimed at the safe connection of energy-efficient Class II appliances to different types of household electrical outlets with cylindrical contacts used in Europe.

However, it is not compatible with the rectangular contacts of BS 1363 type electrical outlets used in Cyprus, Gibraltar, Ireland, Malta and the United Kingdom.

(From Wikipedia/google)

Power cables are made up of one or more elements called cores. Based on the number of cores they are called: unipolar, bipolar, tripolar, quadripolar etc. and their number is determined by the particular electrical system of which they are a part. Each core is made up of a conductor (by copper , by aluminium o sue alloys) covered with a insulating. The section of the conductor depends on the electric current with which the electricity is transmitted.

The larger the section of the conductor, the more difficult it is to move the cable during its laying and use. When it is necessary to improve its flexibility</a , the conductor is made instead of a single wire or a few wires of large cross-section twisted together (rigid conductor), from many thin wires twisted together (flexible conductor). The thinner the individual threads are, the easier the core is to handle. For each section and size of the conductor (number and section of the individual wires) of a certain type of cable, the manufacturer sets the minimum bending radius below which one must not go down during laying or use of the cable itself in order not to compromise its performance. ‘integrity.

The insulation can be made up of textile material, paper (mostly impregnated with particular insulating oils), rubber, compounds based on PVC, polyethylene or other special synthetic materials. The thickness and technical characteristics of the insulation must be such as to ensure that the different conductors never come into contact with each other and that, based on the characteristics of the insulating material used, they are located sufficiently distant so that the different electric potential that exists between them not gives rise to a electric discharge</a .