What is an electrical service mast?
A service mast is the metal pole that rises through your roof or affixes to the exterior of your home. It connects directly to your exterior meter box. Service masts protect large cables called “service entrance conductors” that transfer power from the exterior supply to your home’s power meter.
What is electrical service entrance called?
A weatherhead, also called a weathercap, service head, service entrance cap, or gooseneck (slang) is a weatherproof service drop entry point where overhead power or telephone wires enter a building, or where wires transition between overhead and underground cables.
How tall can an electrical service mast be?
The service mast should not be more than 3-feet vertically above the roof line; most utilities will require bracing or guy wires for additional support of any mast that is taller than 3-feet.
Does service entrance have to be in conduit?
(1) Service-Entrance Cables. So, you’ll either need to have this service-entrance re-run with a conduit, or see if you can get your local electrical inspectors to sign off on using bollards (i.e. concrete-filled metal poles) to protect the meter pan and service cabling as Machavity suggests.
Can you use EMT for a service mast?
Unless the raceway is supporting the drop from the pole you can use EMT.
What is a weatherhead and mast?
The pole is called the mast or riser and it contains a large cable or individual wires known as the service entrance conductors (or service entrance cable). These conductors exit the mast through the weatherhead, which is shaped so that the conductors slant downward as they come out.
What is a service entrance panel?
A modern service entrance panel consists of an enclosure housing the breakers or fuses and associated wiring. If located outside, the enclosure must be weatherproof which keeps rain and moisture from interfering with the electrical parts.
How far does a mast have to be above the roof?
The minimum height of the service mast, from bottom of weatherhead to the roof, is 30 inches. The minimum trade size of the mast is 1¼ inches (good for up to 125 amp services). Masts over 36 inches in height above the roof require rigid bracing.
Can PVC conduit be used for service entrance?
Exposed — PVC conduit is permitted to be used for exposed work. PVC conduit used in an area subject to physical damage must be identified for the application [Sec. 352.10(F)]. Schedule 40 PVC conduit is permitted for exposed locations where not subject to physical damage.
Can I use PVC conduit for service entrance?
It can be conduit or direct burial. Above ground to 18″ below ground it would need to be schedule 80 PVC or could be rigid metallic or IMC. Below 18″ schedule 40 would work. If you go with direct burial it needs to be 24″ with the sections above 24″ protected by schedule 80 or rigid metallic or IMC as a quick overview.
Can I put service entrance cable in conduit?
SE cables simply can’t be buried, conduit or no conduit.
Can I use EMT conduit for service entrance?
Service entrance conductors shall be enclosed in a listed (for example: ETL, or UL) Schedule 80 PVC, EMT, intermediate, or Rigid type of raceway. The use of “T” condulet conduit bodies in the service wire conduit riser ahead of the metering is prohibited.
How much is a new weatherhead?
Coming down the service and into the panel the bonding, the grounding and everything belongs to the customer. It’s the customer’s responsibility.” That means repair costs are left up to the property owner and could range from $700 to $1700.
Who is responsible for the service drop?
For one thing, the service drop belongs to the utility company, not to the homeowner. For another, power in the service drop cables can be shut off only by the utility company. Homeowners also should not attempt any work on the cables between the service drop and the home’s electrical service panel.
What are the two types of service entrance?
Overhead and underground service entrances are both acceptable, though you may or may not have a choice as to which you have.
What is a mast type service?
a fitting that is attached to a service entrance mast, which provides a location for the attachment of the service drop conductors in an overhead service entrance. Rain-Tight. constructed or protected so that exposure to a beating rain will not result in the entrance of water under specified test conditions.
What are the rules and regulations about electrical service masts?
Rules and regulations regarding electrical service masts vary depending what part of the country you live in, so some of the information here may not be applicable in every situation. When in doubt, check with the local electric utility company and electrical inspector.
Can service conductors be attached to the service mast?
Only the electric utility conductors are permitted to be attached to the service mast. Be sure the overhead service drop conductors are free and clear of trees, limbs, debris and vegetation. Trees that grow up into service conductors can damage the conductors and attract lightning strikes, both of which cause many power outages every year.
What is the difference between service entrance and mast service drop?
The service entrance is the place where power enters a residence. It consists of the electric meter and the service panel. A mast service drop is an overhead service drop where the service drop is connected to the mast knob.
Where does the service mast connect to the meter base?
The bottom end of the service mast connects to the home’s meter base. An additional set of service cables starts at the service panel (and the electric meter) and runs up through and out of the service head.