The service mast is the most exposed piece of electrical equipment on a Phoenix home — it sits on the roof or eave, takes 117° summer heat year after year, and is the first thing to fail on a 1970s–1990s home. The lineman pulls up to do a meter swap, looks at the rusted mast, the cracked weatherhead, the bent conductors, and tells you the service can't be re-energized until the mast is replaced. We get this call 30+ times a year. Here's what the work actually looks like in 2026.
Quick price snapshot — Phoenix metro, 2026
| Scope | Typical cost | Timeline |
|---|---|---|
| Weatherhead only replacement (mast still good) | $450 – $750 | 2–4 hours |
| Full 2" rigid steel mast replacement, overhead service | $1,400 – $2,400 | 1 day on-site |
| Full mast + service-entrance conductor replacement | $1,900 – $3,400 | 1 day on-site |
| Full mast + meter base + main panel relocation | $3,800 – $6,500 | 2 days + utility coord |
| Add: underground service conversion (overhead → UG) | + $3,500 – $8,000 | + Trenching + 2–4 weeks utility coord |
| Add: 100A → 200A service upgrade combined with mast | + $1,400 – $2,400 | + 0.5 day |
Combining a mast replacement with a panel upgrade is almost always cheaper than doing them separately — the utility outage and the trip are amortized over both scopes. See our 200A / 400A panel upgrade guide for the combined pricing.
Signs the mast needs replacement
- Visible rust at the weatherhead — the cap and the boot below it have rusted through to the point that water enters during monsoon storms
- Mast bent or leaning — common after high winds or tree contact; bent masts can't carry the lineman's pull stress when reconnecting
- Insulation cracking on the SE conductors — UV damage from decades of AZ sun; bare copper visible through the cracks
- Service drop clearance failing — NEC 230.24 requires 10 ft minimum over walkable surfaces, 12 ft over driveways, 18 ft over roads. Settling or roof modification can drop the clearance below code.
- Conductor strain at the weatherhead boot — when the lineman re-tensions the drop, the conductors can pull out of a worn boot
- Inspector or utility flag — APS, SRP, or the AHJ inspector has tagged it during a different scope of work
NEC code requirements that drive the install
- NEC 230.24(B) — service drop clearance: 10 ft minimum over residential property, 12 ft over driveways, 18 ft over public ways.
- NEC 230.28 — service mast strength: must be sized to withstand the strain of the service drop. 2-inch rigid steel is the standard for most Arizona overhead services; 1¼-inch is permitted in some single-conductor situations but rarely used.
- NEC 230.54 — weatherhead must be raintight and positioned above the drip line; service entrance conductors form a drip loop below the head.
- NEC 250.94 — intersystem bonding termination at the service for communications systems (telephone, CATV, fiber).
- NEC 230.51 — service entrance cable support: every 30" on the wall, within 12" of the weatherhead and the meter base.
- NEC 250.50 + 250.52 — grounding electrode system. Minimum 2 ground rods 6 ft apart, water pipe bond if metallic.
- NEC 230.67 — Type 1 or 2 surge protective device required on all new service entrance installs since 2020.
Mast material choice — rigid steel, IMC, or aluminum
2" rigid steel is the standard for most Arizona overhead services. Strong, holds the drop tension cleanly, predictable in long-term outdoor exposure. Slightly heavier and more expensive than alternatives, but the longest service life.
IMC (Intermediate Metal Conduit) is sometimes used for shorter masts under code-minimum strain situations. Lighter than rigid steel, easier to work with, but not used for full overhead service masts in 2026.
Aluminum service-entrance cable in rigid steel mast is the most common combination — Type SE-U aluminum, 4/0 for 200A service, 2/0 for 100A. Better thermal performance than copper in Arizona summer, half the cost.
APS / SRP utility coordination
APS: a service mast replacement is processed through the standard service order desk. After the permit is approved, APS schedules a meter pull and reset (usually 4–6 hour window). Lineman observes the mast install and signs off. Total APS coordination 5–10 business days.
SRP: similar process but slower. SRP requires 2–3 weeks from permit issue to meter pull appointment in 2026. We schedule the install for the morning to give the AHJ inspector time to inspect after we close up before evening.
Combination meter drops: APS and SRP use slightly different meter-main combos. The new ordinances also require Type 2 SPD; we install the manufacturer-recommended device matched to the meter base.
What a complete scope looks like
- Site walk + photo documentation — every existing connection, the drop clearance, the mast routing
- Permit submission to the AHJ (Phoenix, Scottsdale, Mesa, Tempe, Gilbert, Chandler each have separate processes)
- Utility service order through APS or SRP for the meter pull/reset
- Materials staging — 2" rigid steel mast, SE conductors, weatherhead, mast fittings, roof flashing, meter base if applicable
- Outage day — meter pulled, old mast and conductors removed, new mast installed and properly flashed/sealed, new conductors pulled, weatherhead terminated
- Drip loop + bonding — proper drip loop below the weatherhead, intersystem bonding at the service
- SPD install — Type 1 or Type 2 SPD coordinated at the service entrance
- Re-energize — utility lineman re-attaches the drop and re-energizes
- Inspection — AHJ inspector reviews, signs off, utility releases meter to standard operation
Common questions
Can I keep using my electricity during the work?
No — the utility has to pull the meter for the install. Most full-mast jobs are 4–6 hours of outage in the morning. We schedule for cooler hours and most homeowners coast through with refrigerator pre-cooled and bottled water.
Does my insurance cover service mast replacement?
Often no — service mast is considered an exterior maintenance item, not a covered loss unless storm damage caused the failure. Wind damage and tree impact are usually covered; UV degradation and rust over time are usually not.
What about underground service conversion?
We can convert overhead to underground service for an additional $3,500–$8,000 depending on trenching distance. Worth considering if you're already opening the meter location and the drop is long. Underground service has much longer service life (40–60 years vs 15–25 for overhead).
Will the inspector pass on the same day?
In Phoenix and Scottsdale, AHJ same-day or next-day inspection is the norm in 2026. Tempe, Mesa, Gilbert, Chandler typically next-day. We schedule the inspection in advance so the inspector arrives within an hour or two of energizing.
Related reading
- More articles on the Tech Energy America blog
- 200A & 400A Panel Upgrade Cost in Scottsdale
- EV Charger Installation Cost in Arizona
- Electrical contracting services
Need a service mast replacement quote in Phoenix metro?
Tech Energy America is an authorized electrical distributor. We supply the materials; permitting, utility coordination, and installation are handled by licensed partners.
📞 Call (480) 910-0867✉ Email Quote