diff --git a/src/main/java/com/maires/wnet/entity/Customer.java b/src/main/java/com/maires/wnet/entity/Customer.java
index 5a73020..53b3ae4 100644
--- a/src/main/java/com/maires/wnet/entity/Customer.java
+++ b/src/main/java/com/maires/wnet/entity/Customer.java
@@ -1,5 +1,6 @@
 package com.maires.wnet.entity;
 
+import com.maires.wnet.utils.DateUtil;
 import jakarta.persistence.CascadeType;
 import jakarta.persistence.Column;
 import jakarta.persistence.Entity;
@@ -8,8 +9,6 @@
 import jakarta.persistence.Id;
 import jakarta.persistence.OneToMany;
 import jakarta.persistence.Table;
-import java.time.LocalDateTime;
-import java.time.format.DateTimeFormatter;
 import java.util.List;
 
 
@@ -54,9 +53,7 @@ public Customer(String name, String cpf, String phone, String email) {
     this.cpf = cpf;
     this.phone = phone;
     this.email = email;
-    LocalDateTime now = LocalDateTime.now().minusHours(3);
-    DateTimeFormatter formatter = DateTimeFormatter.ofPattern("dd-MM-yyyy'T'HH:mm:ss");
-    this.registrationDate = now.format(formatter);
+    this.registrationDate = DateUtil.formatCurrentDate();
   }
 
   /**
diff --git a/src/main/java/com/maires/wnet/entity/Equipment.java b/src/main/java/com/maires/wnet/entity/Equipment.java
index f6f7d61..7024fff 100644
--- a/src/main/java/com/maires/wnet/entity/Equipment.java
+++ b/src/main/java/com/maires/wnet/entity/Equipment.java
@@ -4,7 +4,8 @@
 import jakarta.persistence.GeneratedValue;
 import jakarta.persistence.GenerationType;
 import jakarta.persistence.Id;
-import jakarta.persistence.OneToOne;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.ManyToOne;
 import jakarta.persistence.Table;
 import java.util.Date;
 
@@ -30,11 +31,9 @@ public class Equipment {
 
   private Date provisionDate;
 
-  @OneToOne
-  private Installation installationFirst;
-
-  @OneToOne
-  private Installation installationSecond;
+  @ManyToOne
+  @JoinColumn(name = "installation_id")
+  private Installation installation;
 
   /**
    * Instantiates a new Equipment.
@@ -77,18 +76,18 @@ public void setId(Long id) {
   }
 
   /**
-   * Gets addressType.
+   * Gets type.
    *
-   * @return the addressType
+   * @return the type
    */
   public String getType() {
     return type;
   }
 
   /**
-   * Sets addressType.
+   * Sets type.
    *
-   * @param type the addressType
+   * @param type the type
    */
   public void setType(String type) {
     this.type = type;
@@ -165,4 +164,22 @@ public Date getProvisionDate() {
   public void setProvisionDate(Date provisionDate) {
     this.provisionDate = provisionDate;
   }
+
+  /**
+   * Gets installation.
+   *
+   * @return the installation
+   */
+  public Installation getInstallation() {
+    return installation;
+  }
+
+  /**
+   * Sets installation.
+   *
+   * @param installation the installation
+   */
+  public void setInstallation(Installation installation) {
+    this.installation = installation;
+  }
 }
\ No newline at end of file
diff --git a/src/main/java/com/maires/wnet/entity/Installation.java b/src/main/java/com/maires/wnet/entity/Installation.java
index cd4b611..7350556 100644
--- a/src/main/java/com/maires/wnet/entity/Installation.java
+++ b/src/main/java/com/maires/wnet/entity/Installation.java
@@ -1,14 +1,16 @@
 package com.maires.wnet.entity;
 
+import com.maires.wnet.utils.DateUtil;
 import jakarta.persistence.CascadeType;
 import jakarta.persistence.Entity;
 import jakarta.persistence.GeneratedValue;
 import jakarta.persistence.GenerationType;
 import jakarta.persistence.Id;
 import jakarta.persistence.JoinColumn;
+import jakarta.persistence.OneToMany;
 import jakarta.persistence.OneToOne;
 import jakarta.persistence.Table;
-import java.util.Date;
+import java.util.List;
 
 /**
  * The type Installation.
@@ -25,11 +27,8 @@ public class Installation {
   @JoinColumn(name = "address_id")
   private Address address;
 
-  @OneToOne(mappedBy = "installationFirst", cascade = CascadeType.ALL)
-  private Equipment equipmentFirst;
-
-  @OneToOne(mappedBy = "installationSecond", cascade = CascadeType.ALL)
-  private Equipment equipmentSecond;
+  @OneToMany(mappedBy = "installation", cascade = CascadeType.ALL)
+  private List<Equipment> equipments;
 
   @OneToOne
   @JoinColumn(name = "plan_id")
@@ -38,7 +37,7 @@ public class Installation {
   @OneToOne(mappedBy = "installation", cascade = CascadeType.ALL)
   private Technician technician;
 
-  private Date installationDate;
+  private String installationDate;
 
   /**
    * Instantiates a new Installation.
@@ -57,7 +56,7 @@ public Installation(Address address, Plan plan, Technician technician) {
     this.address = address;
     this.plan = plan;
     this.technician = technician;
-    this.installationDate = new Date();
+    this.installationDate = DateUtil.formatCurrentDate();
   }
 
   /**
@@ -79,57 +78,39 @@ public void setId(Long id) {
   }
 
   /**
-   * Gets address id.
+   * Gets address.
    *
-   * @return the address id
+   * @return the address
    */
   public Address getAddress() {
     return address;
   }
 
   /**
-   * Sets address id.
+   * Sets address.
    *
-   * @param address the address id
+   * @param address the address
    */
   public void setAddress(Address address) {
     this.address = address;
   }
 
   /**
-   * Gets equipment first.
-   *
-   * @return the equipment first
-   */
-  public Equipment getEquipmentFirst() {
-    return equipmentFirst;
-  }
-
-  /**
-   * Sets equipment first.
+   * Gets equipments.
    *
-   * @param equipmentFirst the equipment first
+   * @return the equipments
    */
-  public void setEquipmentFirst(Equipment equipmentFirst) {
-    this.equipmentFirst = equipmentFirst;
+  public List<Equipment> getEquipments() {
+    return equipments;
   }
 
   /**
-   * Gets equipment second.
+   * Sets equipments.
    *
-   * @return the equipment second
+   * @param equipments the equipments
    */
-  public Equipment getEquipmentSecond() {
-    return equipmentSecond;
-  }
-
-  /**
-   * Sets equipment second.
-   *
-   * @param equipmentSecond the equipment second
-   */
-  public void setEquipmentSecond(Equipment equipmentSecond) {
-    this.equipmentSecond = equipmentSecond;
+  public void setEquipments(List<Equipment> equipments) {
+    this.equipments = equipments;
   }
 
   /**
@@ -151,36 +132,18 @@ public void setPlan(Plan plan) {
   }
 
   /**
-   * Gets plan id.
-   *
-   * @return the plan id
-   */
-  public Plan getPlanId() {
-    return plan;
-  }
-
-  /**
-   * Sets plan id.
-   *
-   * @param plan the plan id
-   */
-  public void setPlanId(Plan plan) {
-    this.plan = plan;
-  }
-
-  /**
-   * Gets technician id.
+   * Gets technician.
    *
-   * @return the technician id
+   * @return the technician
    */
   public Technician getTechnician() {
     return technician;
   }
 
   /**
-   * Sets technician id.
+   * Sets technician.
    *
-   * @param technician the technician id
+   * @param technician the technician
    */
   public void setTechnician(Technician technician) {
     this.technician = technician;
@@ -191,7 +154,7 @@ public void setTechnician(Technician technician) {
    *
    * @return the installation date
    */
-  public Date getInstallationDate() {
+  public String getInstallationDate() {
     return installationDate;
   }
 
@@ -200,7 +163,7 @@ public Date getInstallationDate() {
    *
    * @param installationDate the installation date
    */
-  public void setInstallationDate(Date installationDate) {
+  public void setInstallationDate(String installationDate) {
     this.installationDate = installationDate;
   }
 }
\ No newline at end of file
diff --git a/src/main/java/com/maires/wnet/repository/AddressRepository.java b/src/main/java/com/maires/wnet/repository/AddressRepository.java
new file mode 100644
index 0000000..e9161e6
--- /dev/null
+++ b/src/main/java/com/maires/wnet/repository/AddressRepository.java
@@ -0,0 +1,13 @@
+package com.maires.wnet.repository;
+
+import com.maires.wnet.entity.Address;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+/**
+ * The interface Address repository.
+ */
+@Repository
+public interface AddressRepository extends JpaRepository<Address, Long> {
+
+}
\ No newline at end of file
diff --git a/src/main/java/com/maires/wnet/repository/CustomerRepository.java b/src/main/java/com/maires/wnet/repository/CustomerRepository.java
new file mode 100644
index 0000000..7b92e24
--- /dev/null
+++ b/src/main/java/com/maires/wnet/repository/CustomerRepository.java
@@ -0,0 +1,13 @@
+package com.maires.wnet.repository;
+
+import com.maires.wnet.entity.Customer;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+/**
+ * The interface Customer repository.
+ */
+@Repository
+public interface CustomerRepository extends JpaRepository<Customer, Long> {
+
+}
\ No newline at end of file
diff --git a/src/main/java/com/maires/wnet/repository/EquipmentRepository.java b/src/main/java/com/maires/wnet/repository/EquipmentRepository.java
new file mode 100644
index 0000000..a4eff28
--- /dev/null
+++ b/src/main/java/com/maires/wnet/repository/EquipmentRepository.java
@@ -0,0 +1,11 @@
+package com.maires.wnet.repository;
+
+import com.maires.wnet.entity.Equipment;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+/**
+ * The interface Equipment repository.
+ */
+public interface EquipmentRepository extends JpaRepository<Equipment, Long> {
+
+}
\ No newline at end of file
diff --git a/src/main/java/com/maires/wnet/repository/InstallationRepository.java b/src/main/java/com/maires/wnet/repository/InstallationRepository.java
new file mode 100644
index 0000000..fd704e2
--- /dev/null
+++ b/src/main/java/com/maires/wnet/repository/InstallationRepository.java
@@ -0,0 +1,13 @@
+package com.maires.wnet.repository;
+
+import com.maires.wnet.entity.Installation;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+/**
+ * The interface Installation repository.
+ */
+@Repository
+public interface InstallationRepository extends JpaRepository<Installation, Long> {
+
+}
\ No newline at end of file
diff --git a/src/main/java/com/maires/wnet/repository/PlanRepository.java b/src/main/java/com/maires/wnet/repository/PlanRepository.java
new file mode 100644
index 0000000..1e34c13
--- /dev/null
+++ b/src/main/java/com/maires/wnet/repository/PlanRepository.java
@@ -0,0 +1,11 @@
+package com.maires.wnet.repository;
+
+import com.maires.wnet.entity.Plan;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+/**
+ * The interface Plan repository.
+ */
+public interface PlanRepository extends JpaRepository<Plan, Long> {
+
+}
\ No newline at end of file
diff --git a/src/main/java/com/maires/wnet/repository/TechnicianRepository.java b/src/main/java/com/maires/wnet/repository/TechnicianRepository.java
new file mode 100644
index 0000000..7b0efc4
--- /dev/null
+++ b/src/main/java/com/maires/wnet/repository/TechnicianRepository.java
@@ -0,0 +1,11 @@
+package com.maires.wnet.repository;
+
+import com.maires.wnet.entity.Technician;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+/**
+ * The interface Technician repository.
+ */
+public interface TechnicianRepository extends JpaRepository<Technician, Long> {
+
+}
\ No newline at end of file
diff --git a/src/main/java/com/maires/wnet/utils/DateUtil.java b/src/main/java/com/maires/wnet/utils/DateUtil.java
new file mode 100644
index 0000000..a1ffffb
--- /dev/null
+++ b/src/main/java/com/maires/wnet/utils/DateUtil.java
@@ -0,0 +1,24 @@
+package com.maires.wnet.utils;
+
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+
+
+/**
+ * The type Date util.
+ */
+public class DateUtil {
+
+  private static final DateTimeFormatter formatter = DateTimeFormatter.ofPattern(
+      "dd-MM-yyyy'T'HH:mm:ss");
+
+  /**
+   * Date util string.
+   *
+   * @return the string
+   */
+  public static String formatCurrentDate() {
+    LocalDateTime now = LocalDateTime.now().minusHours(3);
+    return now.format(formatter);
+  }
+}
\ No newline at end of file