SPE TECH
Kinds of wires
1. TW(thermoplastic moisture resistant wire)
-interior house wiring
-up to 600v ,60 degrees C wet/dry application
2.THW(thermoplastic heat and moisture resistant wire)
-interior house wiring
-up to 600v ,75 degrees C wet/dry application
3.THHN/THWN(thermoplastic heat resistant wire wire w/nylon jacket)
-up to 600v ,75 degrees C wet,90 degrees dry
4.DUREX WIRE NON-METALICSHEATED CABLE
-600v building wire 60 degrees dry/above ground
5.TF WIRE(thermoplastic fixtures)
-<600v>dry/wet location
-ligthing fixtures/interior appliance wire
6.TFN(thermoplastic fixtures w/nylon jacket)
-<600v ,75 degrees C wet,90 degrees dry
-ligthing fixtures/interior appliance wire
7.AAC(All Aluminum Conductor)
-used as overhead transmission and distributions of electric power
8.DUPLEX CORD((thermoplasticparallel cord/spt)
-used for appliance wiring for circuits not exceeding 300v
9.PE(Polyethelyn)Covered AAC
-used as secondary service drop wire
-600v phase to phase from a utility's distribution line of users attach point
-can be used as tranmission line
-aerial installation

SCIENCE
Two Basic Types of Cells

All cells fall into one of the two major classifications: prokaryotes or eukaryotes.
Prokaryotic Cells
Pro = “before”, karyon = “nucleus”
Prokaryotes are evolutionarily ancient. They were here first and for billions of years were the only form of life. And even with the evolution of more complex eukaryotic cells, prokaryotes are supremely successful. All bacteria and bacteria-like Archaea are prokaryotic organisms.
All organisms are composed of one or more cells.
Cells are the basic unit of structure and function in organisms.
All cells come only from other cells.
Eukaryotic Cells
Eu = “true”, karyon = “nucleus”
Eukaryotic cells are more complex, evolving from a prokaryote-like predecessor. Most of the living things that we are typically familiar with are composed of eukaryotic cells; animals, plants, fungi and protists. Eukaryotic organisms can either be single-celled or multi-celled.