YES. You need to have a ground present. An actual grounding wire or the box must be metal, and the jacket on the wire must also be metal. A ground wire can also be run to the grounding electrode (main ground) system and installed within 5 feet of the beginning of the grounding system. If there is no ground present then you have 2 options: install a GFI with indication on it that there is no equipment ground present (the manufacturer provides this), or install a 2 wire outlet.
A GFI receptacle is designed to protect you from potentially fatal electrical shocks. GFI's work by monitoring the current on the hot and neutral wire. If there is a difference between them, no matter how small, the GFI will sense a fault or shock and turn itself off, eliminating risk of possible electrocution.
The National Electric Code requires that GFI outlets be installed in the following locations:
2. Kitchen: all counter top outlets (GFI or GFI protected.)
3. Outside: all outlets below 78 inches
4. Garages, unfinished basements, and crawl spaces
5. Outlets within 6 feet of a wet bar sink.
6. Swimming pools
YES. During normal operation, solid state dimmers generate heat. A solid state dimmer dissipates heat causing the dimmer to feel warm to the touch. Dimmer switches are rated in Watts (generally 600 Watts and 1,000 Watts). The closer the lamp load (output) is to the dimmer's maximum output, the warmer it will become. It is recommended not to exceed 80% of the dimmer's rating.
A halogen bulb is a type of incandescent bulb. It has a tungsten filament just like a regular incandescent lamp, however, the bulb is filled with a halogen gas. When an incandescent lamp operates, tungsten from the filament is evaporated into the gas of the bulb and deposited on the glass wall. The bulb burns out when enough tungsten has evaporated from the filament and electricity can no longer be conducted across it.
This varies from new construction homes to pre existing homes. If you have all electrical appliances including your stove and dryer, are going to have central air conditioning installed, a swimming pool with an electric heat pump installed, or a 4-6 person outdoor hot tub that requires a 50 or 60 AMP circuit installed, then it is time to upgrade to a 200 AMP service. You will need to replace your meter and service wire because of unsafe conditions. The cost difference to upgrade to a 200 AMP service is minimal because the labor costs are not that significant. The higher cost is due to the price of the materials for the upgrade. If you are building a new construction home, a 200 AMP service is becoming the standard for most homes under 5,000 square feet.